[Bf-blender-cvs] [6b9f45c1d1b] master: Sculpt: Fix T101430: Dyntopo undo crash

[Joseph Eagar]

Commit: 6b9f45c1d1bfafffe6fe251ac7330bc5e5ba8ec2
Author: Joseph Eagar
Date:   Fri Sep 30 15:28:26 2022 -0700
Branches: master
https://developer.blender.org/rB6b9f45c1d1bfafffe6fe251ac7330bc5e5ba8ec2

Sculpt: Fix T101430: Dyntopo undo crash

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

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

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

diff --git a/source/blender/editors/sculpt_paint/sculpt_dyntopo.c b/source/blender/editors/sculpt_paint/sculpt_dyntopo.c
index 2e3834803c9..a524f84cc6e 100644
--- a/source/blender/editors/sculpt_paint/sculpt_dyntopo.c
+++ b/source/blender/editors/sculpt_paint/sculpt_dyntopo.c
@@ -147,8 +147,13 @@ static void SCULPT_dynamic_topology_disable_ex(
   SculptSession *ss = ob->sculpt;
   Mesh *me = ob->data;
 
-  BKE_sculpt_attribute_destroy(ob, ss->attrs.dyntopo_node_id_vertex);
-  BKE_sculpt_attribute_destroy(ob, ss->attrs.dyntopo_node_id_face);
+  if (ss->attrs.dyntopo_node_id_vertex) {
+    BKE_sculpt_attribute_destroy(ob, ss->attrs.dyntopo_node_id_vertex);
+  }
+
+  if (ss->attrs.dyntopo_node_id_face) {
+    BKE_sculpt_attribute_destroy(ob, ss->attrs.dyntopo_node_id_face);
+  }
 
   SCULPT_pbvh_clear(ob);