Sculptmode should check for existance of undo data before undo/redo in case user loads a file with sculptmode on and presses undo/redo before doing a sculpt action.

1 files changed, 4 insertions, 2 deletions

diff --git a/source/blender/src/sculptmode.c b/source/blender/src/sculptmode.c
index 5198c99e0b0..558f29b54f1 100644
--- a/source/blender/src/sculptmode.c
+++ b/source/blender/src/sculptmode.c
@@ -432,7 +432,7 @@ void sculptmode_undo()
 {
 	SculptUndo *su= G.scene->sculptdata.undo;
 
-	if(su->cur->prev)
+	if(su && su->cur->prev)
 		sculptmode_undo_update(su->cur->prev);
 }
 
@@ -440,7 +440,7 @@ void sculptmode_redo()
 {
 	SculptUndo *su= G.scene->sculptdata.undo;
 
-	if(su->cur->next)
+	if(su && su->cur->next)
 		sculptmode_undo_update(su->cur->next);
 }
 
@@ -451,6 +451,8 @@ void sculptmode_undo_menu()
 	DynStr *ds= BLI_dynstr_new();
 	char *menu;
 	
+	if(!su) return;
+	
 	BLI_dynstr_append(ds, "Sculpt Mode Undo History %t");
 	for(sus= su->steps.first; sus; sus= sus->next) {
 		BLI_dynstr_append(ds, "|");