--- deliantra/server/common/object.C	2010/03/20 00:42:08	1.312
+++ deliantra/server/common/object.C	2010/03/26 00:05:45	1.313
@@ -1333,7 +1333,7 @@
  *
  * Return value:
  *   new object if 'op' was merged with other object
- *   NULL if 'op' was destroyed
+ *   NULL if there was an error (destroyed, blocked etc.)
  *   just 'op' otherwise
  */
 object *
@@ -2695,3 +2695,19 @@
     }
 }
 
+void object::change_move_type (MoveType mt)
+{
+  if (move_type == mt)
+    return;
+
+  if (is_on_map ())
+    {
+      // we are on the map, so handle move_on/off effects
+      remove ();
+      move_type = mt;
+      map->insert (this, x, y, this);
+    }
+  else
+    move_type = mt;
+}
+