[Bf-blender-cvs] [64e955f] master: Fix crash in active_paint_texture_index callback

[Campbell Barton]

Commit: 64e955f52228b573aeffb96d0b74db8eb6931190
Author: Campbell Barton
Date:   Wed Sep 10 21:56:45 2014 +1000
Branches: master
https://developer.blender.org/rB64e955f52228b573aeffb96d0b74db8eb6931190

Fix crash in active_paint_texture_index callback

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

M	source/blender/makesrna/intern/rna_material.c

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

diff --git a/source/blender/makesrna/intern/rna_material.c b/source/blender/makesrna/intern/rna_material.c
index 37b6947..2e0ad63 100644
--- a/source/blender/makesrna/intern/rna_material.c
+++ b/source/blender/makesrna/intern/rna_material.c
@@ -195,14 +195,17 @@ static void rna_Material_active_paint_texture_index_update(Main *bmain, Scene *s
 			nodeSetActive(ma->nodetree, node);
 	}
 
-	for (sc = bmain->screen.first; sc; sc = sc->id.next) {
-		ScrArea *sa;
-		for (sa = sc->areabase.first; sa; sa = sa->next) {
-			SpaceLink *sl;
-			for (sl = sa->spacedata.first; sl; sl = sl->next) {
-				if (sl->spacetype == SPACE_IMAGE) {
-					SpaceImage *sima = (SpaceImage *)sl;
-					ED_space_image_set(sima, scene, scene->obedit, ma->texpaintslot[ma->paint_active_slot].ima);
+	if (ma->texpaintslot) {
+		Image *image = ma->texpaintslot[ma->paint_active_slot].ima;
+		for (sc = bmain->screen.first; sc; sc = sc->id.next) {
+			ScrArea *sa;
+			for (sa = sc->areabase.first; sa; sa = sa->next) {
+				SpaceLink *sl;
+				for (sl = sa->spacedata.first; sl; sl = sl->next) {
+					if (sl->spacetype == SPACE_IMAGE) {
+						SpaceImage *sima = (SpaceImage *)sl;
+						ED_space_image_set(sima, scene, scene->obedit, image);
+					}
 				}
 			}
 		}