[Bf-blender-cvs] [7b635ac] soc-2013-paint: Fix crash reported on irc by nudelZ, entering texture paint mode in cycles crashes. Ensuring data does not work in node materials, don't set image on image editors.

[Antony Riakiotakis]

Commit: 7b635ac3d36bf37fdd1e0433815c4b3e4721dcf7
Author: Antony Riakiotakis
Date:   Tue May 27 01:18:30 2014 +0300
https://developer.blender.org/rB7b635ac3d36bf37fdd1e0433815c4b3e4721dcf7

Fix crash reported on irc by nudelZ, entering texture paint mode in
cycles crashes. Ensuring data does not work in node materials, don't set
image on image editors.

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

M	source/blender/editors/sculpt_paint/paint_image.c

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

diff --git a/source/blender/editors/sculpt_paint/paint_image.c b/source/blender/editors/sculpt_paint/paint_image.c
index 15c2f41..5c7df32 100644
--- a/source/blender/editors/sculpt_paint/paint_image.c
+++ b/source/blender/editors/sculpt_paint/paint_image.c
@@ -1447,14 +1447,16 @@ static int texture_paint_toggle_exec(bContext *C, wmOperator *op)
 		/* set the current material active paint slot on image editor */
 		ma = give_current_material(ob, ob->actcol);
 
-		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->tot_slots > 0) {
+			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);
+						}
 					}
 				}
 			}