Index: libwnck-2.30.4/libwnck/xutils.c
===================================================================
--- libwnck-2.30.4.orig/libwnck/xutils.c	2010-09-21 13:35:23.844829575 +0700
+++ libwnck-2.30.4/libwnck/xutils.c	2010-09-21 13:36:04.431829977 +0700
@@ -2604,6 +2604,7 @@
 
   lm = g_slice_new0 (LayoutManager);
 
+  lm->display = display;
   lm->screen_number = number;
   lm->token = next_token;
   ++next_token;