1 files changed, 69 insertions, 31 deletions

diff --git a/source/blender/editors/mesh/editmesh_tools.c b/source/blender/editors/mesh/editmesh_tools.c
index abd42f60e23..89e7fcbc775 100644
--- a/source/blender/editors/mesh/editmesh_tools.c
+++ b/source/blender/editors/mesh/editmesh_tools.c
@@ -487,7 +487,7 @@ static int removedoublesflag_exec(bContext *C, wmOperator *op)
 {
 	Object *obedit= CTX_data_edit_object(C);
 	Scene *scene = CTX_data_scene(C);
-	EditMesh *em= ((Mesh *)obedit->data)->edit_mesh;
+	EditMesh *em= EM_GetEditMesh(((Mesh *)obedit->data));
 	char msg[100];
 
 	int cnt = removedoublesflag(em,1,0,scene->toolsettings->doublimit);
@@ -500,6 +500,7 @@ static int removedoublesflag_exec(bContext *C, wmOperator *op)
 		
 	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_SELECT, obedit);
 	
+	EM_EndEditMesh(obedit->data, em);
 	return OPERATOR_FINISHED;	
 }
 
@@ -700,7 +701,7 @@ void extrude_mesh(Object *obedit, EditMesh *em, wmOperator *op)
 static int mesh_extrude_invoke(bContext *C, wmOperator *op, wmEvent *event)
 {
 	Object *obedit= CTX_data_edit_object(C);
-	EditMesh *em= ((Mesh *)obedit->data)->edit_mesh;
+	EditMesh *em= EM_GetEditMesh((Mesh *)obedit->data);
 
 	extrude_mesh(obedit,em, op);
 	
@@ -709,6 +710,7 @@ static int mesh_extrude_invoke(bContext *C, wmOperator *op, wmEvent *event)
 
 	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_SELECT, obedit);
 	
+	EM_EndEditMesh(obedit->data, em);
 	return OPERATOR_FINISHED;	
 }
 
@@ -716,12 +718,13 @@ static int mesh_extrude_invoke(bContext *C, wmOperator *op, wmEvent *event)
 static int mesh_extrude_exec(bContext *C, wmOperator *op)
 {
 	Object *obedit= CTX_data_edit_object(C);
-	EditMesh *em= ((Mesh *)obedit->data)->edit_mesh;
+	EditMesh *em= EM_GetEditMesh(obedit->data);
 	
 	extrude_mesh(obedit,em, op);
 	
 	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_SELECT, obedit);
 	
+	EM_EndEditMesh(obedit->data, em);
 	return OPERATOR_FINISHED;	
 }
 
@@ -747,7 +750,7 @@ void MESH_OT_extrude(wmOperatorType *ot)
 static int split_mesh(bContext *C, wmOperator *op)
 {
 	Object *obedit= CTX_data_edit_object(C);
-	EditMesh *em= ((Mesh *)obedit->data)->edit_mesh;
+	EditMesh *em= EM_GetEditMesh((Mesh *)obedit->data);
 
 	WM_cursor_wait(1);
 
@@ -762,6 +765,7 @@ static int split_mesh(bContext *C, wmOperator *op)
 	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_SELECT, obedit);
 
 //	DAG_object_flush_update(scene, obedit, OB_RECALC_DATA);
+	EM_EndEditMesh(obedit->data, em);
 	return OPERATOR_FINISHED;
 }
 
@@ -783,8 +787,8 @@ void MESH_OT_split(wmOperatorType *ot)
 static int extrude_repeat_mesh(bContext *C, wmOperator *op)
 {
 	Object *obedit= CTX_data_edit_object(C);
-	EditMesh *em= ((Mesh *)obedit->data)->edit_mesh;
-	
+	EditMesh *em= EM_GetEditMesh((Mesh *)obedit->data);
+
 	RegionView3D *rv3d = CTX_wm_region_view3d(C);		
 		
 	int steps = RNA_int_get(op->ptr,"steps");
@@ -820,6 +824,7 @@ static int extrude_repeat_mesh(bContext *C, wmOperator *op)
 	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_SELECT, obedit);
 
 //	DAG_object_flush_update(scene, obedit, OB_RECALC_DATA);
+	EM_EndEditMesh(obedit->data, em);
 	return OPERATOR_FINISHED;
 }
 
@@ -848,7 +853,7 @@ static int spin_mesh(bContext *C, float *dvec, int steps, float degr, int dupli
 	Object *obedit= CTX_data_edit_object(C);
 	View3D *v3d = CTX_wm_view3d(C);
 	Scene *scene = CTX_data_scene(C);
-	EditMesh *em= ((Mesh *)obedit->data)->edit_mesh;
+	EditMesh *em= EM_GetEditMesh((Mesh *)obedit->data);
 	RegionView3D *rv3d= CTX_wm_region_view3d(C);
 	EditVert *eve,*nextve;
 	float nor[3]= {0.0f, 0.0f, 0.0f};
@@ -931,6 +936,7 @@ static int spin_mesh(bContext *C, float *dvec, int steps, float degr, int dupli
 		DAG_object_flush_update(scene, obedit, OB_RECALC_DATA);
 	}
 	
+	EM_EndEditMesh(obedit->data, em);
 	return ok;
 }
 
@@ -971,7 +977,7 @@ void MESH_OT_spin(wmOperatorType *ot)
 static int screw_mesh_exec(bContext *C, wmOperator *op)
 {
 	Object *obedit= CTX_data_edit_object(C);
-	EditMesh *em= ((Mesh *)obedit->data)->edit_mesh;
+	EditMesh *em= EM_GetEditMesh((Mesh *)obedit->data);
 	EditVert *eve,*v1=0,*v2=0;
 	EditEdge *eed;
 	float dvec[3], nor[3];
@@ -1007,6 +1013,7 @@ static int screw_mesh_exec(bContext *C, wmOperator *op)
 	}
 	if(v1==NULL || v2==NULL) {
 		BKE_report(op->reports, RPT_ERROR, "You have to select a string of connected vertices too");
+		EM_EndEditMesh(obedit->data, em);
 		return OPERATOR_CANCELLED;
 	}
 
@@ -1025,13 +1032,16 @@ static int screw_mesh_exec(bContext *C, wmOperator *op)
 	
 	if(spin_mesh(C, dvec, turns*steps, 360.0f*turns, 0)) {
 		WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_SELECT, obedit);
-		
+		EM_EndEditMesh(obedit->data, em);		
 		return OPERATOR_FINISHED;
 	}
 	else {
 		BKE_report(op->reports, RPT_ERROR, "No valid vertices are selected");
+		EM_EndEditMesh(obedit->data, em);
 		return OPERATOR_CANCELLED;
 	}
+
+	EM_EndEditMesh(obedit->data, em);
 }
 
 void MESH_OT_screw(wmOperatorType *ot)
@@ -1252,12 +1262,13 @@ static EnumPropertyItem prop_mesh_delete_types[] = {
 static int delete_mesh_exec(bContext *C, wmOperator *op)
 {
 	Object *obedit= CTX_data_edit_object(C);
-	EditMesh *em= ((Mesh *)obedit->data)->edit_mesh;
+	EditMesh *em= EM_GetEditMesh((Mesh *)obedit->data);
 	
 	delete_mesh(obedit,em, op,RNA_enum_get(op->ptr, "type"));
 	
 	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_SELECT, obedit);
 	
+	EM_EndEditMesh(obedit->data, em);
 	return OPERATOR_FINISHED;
 }
 
@@ -3626,7 +3637,7 @@ static void edge_rotate(EditMesh *em, wmOperator *op, EditEdge *eed,int dir)
 static int edge_rotate_selected(bContext *C, wmOperator *op)
 {
 	Object *obedit= CTX_data_edit_object(C);
-	EditMesh *em= ((Mesh *)obedit->data)->edit_mesh;
+	EditMesh *em= EM_GetEditMesh((Mesh *)obedit->data);
 		
 	int dir = RNA_int_get(op->ptr,"dir"); // dir == 2 when clockwise and ==1 for counter CW.
 	EditEdge *eed;
@@ -3665,6 +3676,7 @@ static int edge_rotate_selected(bContext *C, wmOperator *op)
 		else 
 		{
 			BKE_report(op->reports, RPT_ERROR, "Select one edge or two adjacent faces");
+			EM_EndEditMesh(obedit->data, em);
 			return OPERATOR_CANCELLED;
 		}
 	}
@@ -3680,6 +3692,7 @@ static int edge_rotate_selected(bContext *C, wmOperator *op)
 	else 
 	{	
 		BKE_report(op->reports, RPT_ERROR, "Select one edge or two adjacent faces");
+		EM_EndEditMesh(obedit->data, em);
 		return OPERATOR_CANCELLED;
 	}
 	
@@ -3691,7 +3704,7 @@ static int edge_rotate_selected(bContext *C, wmOperator *op)
 
 	
 //	DAG_object_flush_update(scene, obedit, OB_RECALC_DATA);
-	
+	EM_EndEditMesh(obedit->data, em);
 	return OPERATOR_FINISHED;
 
 }
@@ -4746,7 +4759,7 @@ static int mesh_rip_invoke(bContext *C, wmOperator *op, wmEvent *event)
 	ARegion *ar= CTX_wm_region(C);
 	RegionView3D *rv3d= ar->regiondata;
 	Object *obedit= CTX_data_edit_object(C);
-	EditMesh *em= ((Mesh *)obedit->data)->edit_mesh;
+	EditMesh *em= EM_GetEditMesh((Mesh *)obedit->data);
 	EditVert *eve, *nextve;
 	EditEdge *eed, *seed= NULL;
 	EditFace *efa, *sefa= NULL;
@@ -4790,10 +4803,12 @@ static int mesh_rip_invoke(bContext *C, wmOperator *op, wmEvent *event)
 	
 	if(efa) {
 		BKE_report(op->reports, RPT_ERROR, "Can't perform ripping with faces selected this way");
+		EM_EndEditMesh(obedit->data, em);
 		return OPERATOR_CANCELLED;
 	}
 	if(sefa==NULL) {
 		BKE_report(op->reports, RPT_ERROR, "No proper selection or faces included");
+		EM_EndEditMesh(obedit->data, em);
 		return OPERATOR_CANCELLED;
 	}
 	
@@ -4858,6 +4873,7 @@ static int mesh_rip_invoke(bContext *C, wmOperator *op, wmEvent *event)
 	
 	if(seed==NULL) {	// never happens?
 		BKE_report(op->reports, RPT_ERROR, "No proper edge found to start");
+		EM_EndEditMesh(obedit->data, em);
 		return OPERATOR_CANCELLED;
 	}
 	
@@ -4947,6 +4963,7 @@ static int mesh_rip_invoke(bContext *C, wmOperator *op, wmEvent *event)
 //	scene->prop_mode = propmode;
 // XXX	scene->proportional = prop;
 
+	EM_EndEditMesh(obedit->data, em);
 	return OPERATOR_FINISHED;
 }
 
@@ -5885,7 +5902,7 @@ void pathselect(EditMesh *em, wmOperator *op)
 static int region_to_loop(bContext *C, wmOperator *op)
 {
 	Object *obedit= CTX_data_edit_object(C);
-	EditMesh *em= ((Mesh *)obedit->data)->edit_mesh;
+	EditMesh *em= EM_GetEditMesh((Mesh *)obedit->data);
 	EditEdge *eed;
 	EditFace *efa;
 	
@@ -5918,6 +5935,7 @@ static int region_to_loop(bContext *C, wmOperator *op)
 	
 	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_SELECT, obedit);
 	
+	EM_EndEditMesh(obedit->data, em);
 	return OPERATOR_FINISHED;
 }
 
@@ -6062,7 +6080,7 @@ static int loop_bisect(EditMesh *em, Collection *edgecollection){
 static int loop_to_region(bContext *C, wmOperator *op)
 {
 	Object *obedit= CTX_data_edit_object(C);
-	EditMesh *em= ((Mesh *)obedit->data)->edit_mesh;
+	EditMesh *em= EM_GetEditMesh((Mesh *)obedit->data);
 
 
 	EditFace *efa;
@@ -6094,7 +6112,7 @@ static int loop_to_region(bContext *C, wmOperator *op)
 //	if (EM_texFaceCheck())
 
 	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_SELECT, obedit);
-	
+	EM_EndEditMesh(obedit->data, em);
 	return OPERATOR_FINISHED;
 }
 
@@ -6119,7 +6137,7 @@ void MESH_OT_loop_to_region(wmOperatorType *ot)
 static int mesh_rotate_uvs(bContext *C, wmOperator *op)
 {
 	Object *obedit= CTX_data_edit_object(C);
-	EditMesh *em= ((Mesh *)obedit->data)->edit_mesh;
+	EditMesh *em= EM_GetEditMesh((Mesh *)obedit->data);
 
 	EditFace *efa;
 	short change = 0, ccw;
@@ -6129,6 +6147,7 @@ static int mesh_rotate_uvs(bContext *C, wmOperator *op)
 
 	if (!EM_texFaceCheck(em)) {
 		BKE_report(op->reports, RPT_ERROR, "mesh has no uv/image layers");
+		EM_EndEditMesh(obedit->data, em);
 		return OPERATOR_CANCELLED;
 	}
 	
@@ -6185,13 +6204,14 @@ static int mesh_rotate_uvs(bContext *C, wmOperator *op)
 		WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_SELECT, obedit);
 	}
 	
+	EM_EndEditMesh(obedit->data, em);
 	return OPERATOR_FINISHED;
 }
 
 static int mesh_mirror_uvs(bContext *C, wmOperator *op)
 {
 	Object *obedit= CTX_data_edit_object(C);
-	EditMesh *em= ((Mesh *)obedit->data)->edit_mesh;
+	EditMesh *em= EM_GetEditMesh((Mesh *)obedit->data);
 
 	EditFace *efa;
 	short change = 0, altaxis;
@@ -6201,6 +6221,7 @@ static int mesh_mirror_uvs(bContext *C, wmOperator *op)
 	
 	if (!EM_texFaceCheck(em)) {
 		BKE_report(op->reports, RPT_ERROR, "mesh has no uv/image layers");
+		EM_EndEditMesh(obedit->data, em);
 		return OPERATOR_CANCELLED;
 	}
 	
@@ -6271,13 +6292,15 @@ static int mesh_mirror_uvs(bContext *C, wmOperator *op)
 //		DAG_object_flush_update(scene, obedit, OB_RECALC_DATA);
 		WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_SELECT, obedit);
 	}
+
+	EM_EndEditMesh(obedit->data, em);
 	return OPERATOR_FINISHED;
 }
 
 static int mesh_rotate_colors(bContext *C, wmOperator *op)
 {
 	Object *obedit= CTX_data_edit_object(C);
-	EditMesh *em= ((Mesh *)obedit->data)->edit_mesh;
+	EditMesh *em= EM_GetEditMesh((Mesh *)obedit->data);
 
 	EditFace *efa;
 	short change = 0, ccw;
@@ -6286,6 +6309,7 @@ static int mesh_rotate_colors(bContext *C, wmOperator *op)
 	
 	if (!EM_vertColorCheck(em)) {
 		BKE_report(op->reports, RPT_ERROR, "mesh has no color layers");
+		EM_EndEditMesh(obedit->data, em);
 		return OPERATOR_CANCELLED;
 	}
 	
@@ -6325,6 +6349,7 @@ static int mesh_rotate_colors(bContext *C, wmOperator *op)
 		WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_SELECT, obedit);
 	}	
 	
+	EM_EndEditMesh(obedit->data, em);
 	return OPERATOR_FINISHED;
 }
 
@@ -6332,7 +6357,7 @@ static int mesh_rotate_colors(bContext *C, wmOperator *op)
 static int mesh_mirror_colors(bContext *C, wmOperator *op)
 {
 	Object *obedit= CTX_data_edit_object(C);
-	EditMesh *em= ((Mesh *)obedit->data)->edit_mesh;
+	EditMesh *em= EM_GetEditMesh((Mesh *)obedit->data);
 
 	EditFace *efa;
 	short change = 0, altaxis;
@@ -6341,6 +6366,7 @@ static int mesh_mirror_colors(bContext *C, wmOperator *op)
 	
 	if (!EM_vertColorCheck(em)) {
 		BKE_report(op->reports, RPT_ERROR, "Mesh has no color layers");
+		EM_EndEditMesh(obedit->data, em);
 		return OPERATOR_CANCELLED;
 	}
 	
@@ -6379,6 +6405,7 @@ static int mesh_mirror_colors(bContext *C, wmOperator *op)
 		WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_SELECT, obedit);
 	}
 	
+	EM_EndEditMesh(obedit->data, em);
 	return OPERATOR_FINISHED;
 }
 
@@ -6442,12 +6469,13 @@ static int subdivide_exec(bContext *C, wmOperator *op)
 {
 	Object *obedit= CTX_data_edit_object(C);
 	Scene *scene = CTX_data_scene(C);
-	EditMesh *em= ((Mesh *)obedit->data)->edit_mesh;
+	EditMesh *em= EM_GetEditMesh((Mesh *)obedit->data);
 	
 	esubdivideflag(obedit, em, 1, 0.0, scene->toolsettings->editbutflag, 1, 0);
 		
 	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_SELECT, obedit);
 	
+	EM_EndEditMesh(obedit->data, em);
 	return OPERATOR_FINISHED;	
 }
 
@@ -6469,12 +6497,13 @@ static int subdivide_multi_exec(bContext *C, wmOperator *op)
 {
 	Object *obedit= CTX_data_edit_object(C);
 	Scene *scene = CTX_data_scene(C);
-	EditMesh *em= ((Mesh *)obedit->data)->edit_mesh;
+	EditMesh *em= EM_GetEditMesh((Mesh *)obedit->data);
 	
 	esubdivideflag(obedit, em, 1, 0.0, scene->toolsettings->editbutflag, RNA_int_get(op->ptr,"number_cuts"), 0);
 		
 	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_SELECT, obedit);
 	
+	EM_EndEditMesh(obedit->data, em);
 	return OPERATOR_FINISHED;	
 }
 
@@ -6499,12 +6528,13 @@ static int subdivide_multi_fractal_exec(bContext *C, wmOperator *op)
 {
 	Object *obedit= CTX_data_edit_object(C);
 	Scene *scene = CTX_data_scene(C);
-	EditMesh *em= ((Mesh *)obedit->data)->edit_mesh;
+	EditMesh *em= EM_GetEditMesh((Mesh *)obedit->data);
 
 	esubdivideflag(obedit, em, 1, -(RNA_float_get(op->ptr, "random_factor")/100), scene->toolsettings->editbutflag, RNA_int_get(op->ptr, "number_cuts"), 0);
 		
 	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_SELECT, obedit);
 	
+	EM_EndEditMesh(obedit->data, em);
 	return OPERATOR_FINISHED;	
 }
 
@@ -6530,12 +6560,13 @@ static int subdivide_smooth_exec(bContext *C, wmOperator *op)
 {
 	Object *obedit= CTX_data_edit_object(C);
 	Scene *scene = CTX_data_scene(C);
-	EditMesh *em= ((Mesh *)obedit->data)->edit_mesh;
+	EditMesh *em= EM_GetEditMesh((Mesh *)obedit->data);
 
 	esubdivideflag(obedit, em, 1, 0.292f*RNA_float_get(op->ptr, "smoothness"), scene->toolsettings->editbutflag | B_SMOOTH, 1, 0);
 		
 	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_SELECT, obedit);
 	
+	EM_EndEditMesh(obedit->data, em);
 	return OPERATOR_FINISHED;	
 }
 
@@ -6870,13 +6901,14 @@ static void fill_mesh(EditMesh *em)
 static int fill_mesh_exec(bContext *C, wmOperator *op)
 {
 	Object *obedit= CTX_data_edit_object(C);
-	EditMesh *em= ((Mesh *)obedit->data)->edit_mesh;
+	EditMesh *em= EM_GetEditMesh((Mesh *)obedit->data);
 	
 	fill_mesh(em);
 	DAG_object_flush_update(CTX_data_scene(C), obedit, OB_RECALC_DATA);
 	
 	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_SELECT, obedit);
 	
+	EM_EndEditMesh(obedit->data, em);
 	return OPERATOR_FINISHED;
 	
 }
@@ -6898,12 +6930,13 @@ void MESH_OT_fill(wmOperatorType *ot)
 static int beauty_fill_exec(bContext *C, wmOperator *op)
 {
 	Object *obedit= CTX_data_edit_object(C);
-	EditMesh *em= ((Mesh *)obedit->data)->edit_mesh;
+	EditMesh *em= EM_GetEditMesh((Mesh *)obedit->data);
 	
 	beauty_fill(em);
 	
 	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_SELECT, obedit);
 	
+	EM_EndEditMesh(obedit->data, em);
 	return OPERATOR_FINISHED;
 }
 
@@ -6924,12 +6957,13 @@ void MESH_OT_beauty_fill(wmOperatorType *ot)
 static int convert_quads_to_tris_exec(bContext *C, wmOperator *op)
 {
 	Object *obedit= CTX_data_edit_object(C);
-	EditMesh *em= ((Mesh *)obedit->data)->edit_mesh;
+	EditMesh *em= EM_GetEditMesh((Mesh *)obedit->data);
 	
 	convert_to_triface(em,0);
 	
 	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_SELECT, obedit);
 	
+	EM_EndEditMesh(obedit->data, em);
 	return OPERATOR_FINISHED;
 }
 
@@ -6950,12 +6984,13 @@ void MESH_OT_convert_quads_to_tris(wmOperatorType *ot)
 static int convert_tris_to_quads_exec(bContext *C, wmOperator *op)
 {
 	Object *obedit= CTX_data_edit_object(C);
-	EditMesh *em= ((Mesh *)obedit->data)->edit_mesh;
+	EditMesh *em= EM_GetEditMesh((Mesh *)obedit->data);
 
 	join_triangles(em);
 	
 	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_SELECT, obedit);
 	
+	EM_EndEditMesh(obedit->data, em);
 	return OPERATOR_FINISHED;
 }
 
@@ -6976,12 +7011,13 @@ void MESH_OT_convert_tris_to_quads(wmOperatorType *ot)
 static int edge_flip_exec(bContext *C, wmOperator *op)
 {
 	Object *obedit= CTX_data_edit_object(C);
-	EditMesh *em= ((Mesh *)obedit->data)->edit_mesh;
+	EditMesh *em= EM_GetEditMesh((Mesh *)obedit->data);
 	
 	edge_flip(em);
 	
 	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_SELECT, obedit);
 	
+	EM_EndEditMesh(obedit->data, em);
 	return OPERATOR_FINISHED;
 }
 
@@ -7002,12 +7038,13 @@ void MESH_OT_edge_flip(wmOperatorType *ot)
 static int mesh_faces_shade_smooth_exec(bContext *C, wmOperator *op)
 {
 	Object *obedit= CTX_data_edit_object(C);
-	EditMesh *em= ((Mesh *)obedit->data)->edit_mesh;
+	EditMesh *em= EM_GetEditMesh((Mesh *)obedit->data);
 	
 	mesh_set_smooth_faces(em,1);
 	
 	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_SELECT, obedit);
 	
+	EM_EndEditMesh(obedit->data, em);
 	return OPERATOR_FINISHED;
 }
 
@@ -7028,12 +7065,13 @@ void MESH_OT_faces_shade_smooth(wmOperatorType *ot)
 static int mesh_faces_shade_solid_exec(bContext *C, wmOperator *op)
 {
 	Object *obedit= CTX_data_edit_object(C);
-	EditMesh *em= ((Mesh *)obedit->data)->edit_mesh;
+	EditMesh *em= EM_GetEditMesh((Mesh *)obedit->data);
 	
 	mesh_set_smooth_faces(em,0);
 	
 	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_SELECT, obedit);
 	
+	EM_EndEditMesh(obedit->data, em);
 	return OPERATOR_FINISHED;
 }