make use customdata typeoffset more, add an assert to ensure its to date.

2 files changed, 8 insertions, 1 deletions

diff --git a/source/blender/bmesh/intern/bmesh_mesh.c b/source/blender/bmesh/intern/bmesh_mesh.c
index 32879caec71..d3e3bcd3556 100644
--- a/source/blender/bmesh/intern/bmesh_mesh.c
+++ b/source/blender/bmesh/intern/bmesh_mesh.c
@@ -85,6 +85,11 @@ BMesh *BM_mesh_create(BMAllocTemplate *allocsize)
 	bm->stackdepth = 1;
 	bm->totflags = 1;
 
+	CustomData_reset(&bm->vdata);
+	CustomData_reset(&bm->edata);
+	CustomData_reset(&bm->ldata);
+	CustomData_reset(&bm->pdata);
+
 	return bm;
 }
 
diff --git a/source/blender/bmesh/intern/bmesh_mesh_conv.c b/source/blender/bmesh/intern/bmesh_mesh_conv.c
index b0a9168ffda..62abf43829b 100644
--- a/source/blender/bmesh/intern/bmesh_mesh_conv.c
+++ b/source/blender/bmesh/intern/bmesh_mesh_conv.c
@@ -536,7 +536,9 @@ void BM_mesh_bm_to_me(BMesh *bm, Mesh *me, int dotess)
 	oldverts = me->mvert;
 
 	/* don't free this yet */
-	CustomData_set_layer(&me->vdata, CD_MVERT, NULL);
+	if (oldverts) {
+		CustomData_set_layer(&me->vdata, CD_MVERT, NULL);
+	}
 
 	/* free custom data */
 	CustomData_free(&me->vdata, me->totvert);