[libegg] Add a GDK_DISPLAY_XDISPLAY cast

[David King <davidk src gnome org>]

commit 0b93c020ae7c78eee85bd56e8eed199e60c1504b
Author: David King <davidk openismus com>
Date:   Wed Mar 30 11:04:51 2011 +0200

    Add a GDK_DISPLAY_XDISPLAY cast

 libegg/treeviewutils/eggcellrendererkeys.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/libegg/treeviewutils/eggcellrendererkeys.c b/libegg/treeviewutils/eggcellrendererkeys.c
index 724b35b..a136d0f 100644
--- a/libegg/treeviewutils/eggcellrendererkeys.c
+++ b/libegg/treeviewutils/eggcellrendererkeys.c
@@ -331,7 +331,7 @@ is_modifier (guint keycode)
   XModifierKeymap *mod_keymap;
   gboolean retval = FALSE;
 
-  mod_keymap = XGetModifierMapping (gdk_display_get_default ());
+  mod_keymap = XGetModifierMapping (GDK_DISPLAY_XDISPLAY (gdk_display_get_default ()));
 
   map_size = 8 * mod_keymap->max_keypermod;
   i = 0;