[gnome-control-center] egg-list-box: Update to latest master

[Jeremy Bicha <jbicha src gnome org>]

commit 878e1a1852a17815ec175749452cffe6729ed8e7
Author: Jeremy Bicha <jbicha ubuntu com>
Date:   Thu Feb 14 20:28:56 2013 -0500

    egg-list-box: Update to latest master
    
    https://bugzilla.gnome.org/show_bug.cgi?id=692258

 egg-list-box |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/egg-list-box b/egg-list-box
index ebcc7ed..491db4b 160000
--- a/egg-list-box
+++ b/egg-list-box
@@ -1 +1 @@
-Subproject commit ebcc7ed3bd2782e29e56b5452a5d4080d4d87cc7
+Subproject commit 491db4b5eb181f1e13b909644dfd0ad971231099