From 0c78232cededc7b45437f020533ffdd945afe97f Mon Sep 17 00:00:00 2001
From: Ton Roosendaal <ton@blender.org>
Date: Fri, 9 Sep 2005 15:38:20 +0000
Subject: [PATCH] Fix: when using in WeightPaint the Wkey option for the first
 time (no vertex groups yet on Mesh), the undobuffer for Wpaint got corrupt.

---
 source/blender/src/editobject.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/source/blender/src/editobject.c b/source/blender/src/editobject.c
index 5e1ead6155b..6ab702a41d4 100644
--- a/source/blender/src/editobject.c
+++ b/source/blender/src/editobject.c
@@ -1958,7 +1958,7 @@ void special_editmenu(void)
 				nr= pupmenu("Specials%t|Apply Bone Envelopes to VertexGroups %x1");
 				if(nr==1) {
 					Mesh *me= ob->data;
-					copy_wpaint_undo(me->dvert, me->totvert);
+					if(me->dvert) copy_wpaint_undo(me->dvert, me->totvert);
 					pose_adds_vgroups(ob);
 				}
 			}