bugfix [#28111] material.pop breaks mt->mat_nr

create a new parameter for materials.pop() to not remove material slot.
this way the mat_nr is still the old one.

for the default behaviour we now have material remapping (i.e. data_delete_material_index_id(id, index)).
This new function is brought from the material_slot remove function.

1 files changed, 2 insertions, 2 deletions

diff --git a/source/blender/blenkernel/intern/mesh.c b/source/blender/blenkernel/intern/mesh.c
index 45a60b842a7..32819226361 100644
--- a/source/blender/blenkernel/intern/mesh.c
+++ b/source/blender/blenkernel/intern/mesh.c
@@ -1254,10 +1254,10 @@ void mesh_to_curve(Scene *scene, Object *ob)
 
 void mesh_delete_material_index(Mesh *me, int index)
 {
+	MFace *mf;
 	int i;
 
-	for (i=0; i<me->totface; i++) {
-		MFace *mf = &((MFace*) me->mface)[i];
+	for (i=0, mf=me->mface; i<me->totface; i++, mf++) {
 		if (mf->mat_nr && mf->mat_nr>=index) 
 			mf->mat_nr--;
 	}