[gnome-control-center] language-chooser: Fix a compiler warning

[Rui Matos <rtcm src gnome org>]

commit 260a739eb801536ac2eb97abe4f38d35206958e0
Author: Rui Matos <tiagomatos gmail com>
Date:   Mon May 27 17:43:03 2013 +0200

    language-chooser: Fix a compiler warning

 panels/common/cc-language-chooser.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/panels/common/cc-language-chooser.c b/panels/common/cc-language-chooser.c
index e14653c..0af18aa 100644
--- a/panels/common/cc-language-chooser.c
+++ b/panels/common/cc-language-chooser.c
@@ -252,9 +252,9 @@ out:
 }
 
 static gint
-sort_languages (gconstpointer a,
-            gconstpointer b,
-            gpointer      data)
+sort_languages (GtkWidget *a,
+                GtkWidget *b,
+                gpointer   data)
 {
         const gchar *la;
         const gchar *lb;