[Bf-blender-cvs] [c36d7df] soc-2013-paint: Fix dm material array generation after last corrections.

[Antony Riakiotakis]

Commit: c36d7df933dd248b16823ac01a952741f325fc64
Author: Antony Riakiotakis
Date:   Tue Jun 24 17:08:54 2014 +0300
https://developer.blender.org/rBc36d7df933dd248b16823ac01a952741f325fc64

Fix dm material array generation after last corrections.

===================================================================

M	source/blender/blenkernel/intern/DerivedMesh.c

===================================================================

diff --git a/source/blender/blenkernel/intern/DerivedMesh.c b/source/blender/blenkernel/intern/DerivedMesh.c
index 1536820..25cd1a8 100644
--- a/source/blender/blenkernel/intern/DerivedMesh.c
+++ b/source/blender/blenkernel/intern/DerivedMesh.c
@@ -501,8 +501,11 @@ void DM_update_materials(DerivedMesh *dm, Object *ob)
 
 	dm->mat = MEM_callocN(totmat * sizeof(*dm->mat), "DerivedMesh.mat");
 
-	for (i = 1; i < totmat; i++) {
-		dm->mat[i] = give_current_material(ob, i);
+	/* we leave last material as empty - rationale here is being able to index
+	 * the materials by using the mf->mat_nr directly and leaving the last
+	 * material as NULL in case no materials exist on mesh, so indexing will not fail */
+	for (i = 0; i < totmat - 1; i++) {
+		dm->mat[i] = give_current_material(ob, i + 1);
 	}
 }