[mutter] prefs: Fix memory leak

[Jasper St. Pierre <jstpierre src gnome org>]

commit 2eb3ff4bfb073da409be7a7320eb3d75d8ef2bfa
Author: Jasper St. Pierre <jstpierre mecheye net>
Date:   Sun Dec 18 22:55:26 2011 -0500

    prefs: Fix memory leak

 src/core/prefs.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/src/core/prefs.c b/src/core/prefs.c
index 0d3fd59..92aec45 100644
--- a/src/core/prefs.c
+++ b/src/core/prefs.c
@@ -914,6 +914,8 @@ do_override (char *key,
   detailed_signal = g_strdup_printf ("changed::%s", key);
   handler_id = g_signal_connect (settings, detailed_signal,
                                  G_CALLBACK (settings_changed), NULL);
+  g_free (detailed_signal);
+
   g_object_set_data (G_OBJECT (settings), key, GUINT_TO_POINTER (handler_id));
 
   settings_changed (settings, key, NULL);