$OpenBSD: patch-src_core_prefs_c,v 1.1 2008/11/22 23:48:52 jasper Exp $

From upstream GNOME, metacity revision 4001.

--- src/core/prefs.c.orig	Sun Nov 23 00:20:53 2008
+++ src/core/prefs.c	Sun Nov 23 00:21:21 2008
@@ -1380,7 +1380,7 @@ mouse_button_mods_handler (MetaPreference pref,
   meta_topic (META_DEBUG_KEYBINDINGS,
               "Mouse button modifier has new gconf value \"%s\"\n",
               string_value);
-  if (meta_ui_parse_modifier (string_value, &mods))
+  if (string_value && meta_ui_parse_modifier (string_value, &mods))
     {
       mouse_button_mods = mods;
     }
