[Bf-blender-cvs] [d203edf] master: Fix T40291: Crash when adding # driver to some fields

[Campbell Barton]

Commit: d203edfc9384f8632fce122dc8313a4745799a86
Author: Campbell Barton
Date:   Wed May 21 16:33:48 2014 +1000
https://developer.blender.org/rBd203edfc9384f8632fce122dc8313a4745799a86

Fix T40291: Crash when adding # driver to some fields

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

M	source/blender/editors/interface/interface_anim.c

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

diff --git a/source/blender/editors/interface/interface_anim.c b/source/blender/editors/interface/interface_anim.c
index f0f0835..fa0832b 100644
--- a/source/blender/editors/interface/interface_anim.c
+++ b/source/blender/editors/interface/interface_anim.c
@@ -172,6 +172,9 @@ bool ui_but_anim_expression_create(uiBut *but, const char *str)
 	
 	/* get path */
 	path = RNA_path_from_ID_to_property(&but->rnapoin, but->rnaprop);
+	if (path == NULL) {
+		return false;
+	}
 	
 	/* create driver */
 	fcu = verify_driver_fcurve(id, path, but->rnaindex, 1);