Sculpt-dev: fix corruption in dyntopo

fast pbvh leaf builder callback.

source/blender/blenkernel/intern/dyntopo.c

@@ -1906,7 +1906,9 @@ static void short_edge_queue_edge_add(EdgeQueueContext *eq_ctx, BMEdge *e)
   }
 }
 
-static void long_edge_queue_face_add(EdgeQueueContext *eq_ctx, BMFace *f, bool ignore_frontface)
+ATTR_NO_OPT static void long_edge_queue_face_add(EdgeQueueContext *eq_ctx,
+                                                 BMFace *f,
+                                                 bool ignore_frontface)
 {
 #ifdef USE_EDGEQUEUE_FRONTFACE
   if (!ignore_frontface && eq_ctx->q->use_view_normal) {

source/blender/blenkernel/intern/pbvh_bmesh.c

@@ -1578,7 +1578,7 @@ static void pbvh_bmesh_create_leaf_fast_task_cb(void *__restrict userdata,
 
       int old = BM_ELEM_CD_GET_INT(v, pbvh->cd_vert_node_offset);
 
-      char *ptr = (char *)v;
+      char *ptr = (char *)v->head.data;
       ptr += pbvh->cd_vert_node_offset;
 
       if (old == DYNTOPO_NODE_NONE &&