[Bf-blender-cvs] [ae00011] master: Fix T45496: Crash loading file during preview

[Campbell Barton]

Commit: ae00011956fc09266ea867857557536e97d1fffa
Author: Campbell Barton
Date:   Tue Jul 21 16:00:55 2015 +1000
Branches: master
https://developer.blender.org/rBae00011956fc09266ea867857557536e97d1fffa

Fix T45496: Crash loading file during preview

Regression from multi-view

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

M	source/blender/editors/render/render_preview.c

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

diff --git a/source/blender/editors/render/render_preview.c b/source/blender/editors/render/render_preview.c
index 9ed0cec..0a7455b 100644
--- a/source/blender/editors/render/render_preview.c
+++ b/source/blender/editors/render/render_preview.c
@@ -559,10 +559,16 @@ static bool ed_preview_draw_rect(ScrArea *sa, int split, int first, rcti *rect,
 
 	RE_AcquireResultImageViews(re, &rres);
 
-	/* material preview only needs monoscopy (view 0) */
-	rv = RE_RenderViewGetById(&rres, 0);
+	if (!BLI_listbase_is_empty(&rres.views)) {
+		/* material preview only needs monoscopy (view 0) */
+		rv = RE_RenderViewGetById(&rres, 0);
+	}
+	else {
+		/* possible the job clears the views but we're still drawing T45496 */
+		rv = NULL;
+	}
 
-	if (rv->rectf) {
+	if (rv && rv->rectf) {
 		
 		if (ABS(rres.rectx - newx) < 2 && ABS(rres.recty - newy) < 2) {