[gnome-control-center] user-accounts: Fix possible free of unowned string

[Bastien Nocera <hadess src gnome org>]

commit fa022622d2c69da2db6811c6fbb3bcefd292c967
Author: Bastien Nocera <hadess hadess net>
Date:   Wed Feb 20 17:23:15 2013 +0100

    user-accounts: Fix possible free of unowned string
    
    And the subsequent crasher.

 panels/user-accounts/um-user-panel.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/panels/user-accounts/um-user-panel.c b/panels/user-accounts/um-user-panel.c
index 89797c7..d14de73 100644
--- a/panels/user-accounts/um-user-panel.c
+++ b/panels/user-accounts/um-user-panel.c
@@ -770,7 +770,7 @@ language_response (GtkDialog         *dialog,
                 act_user_set_language (user, lang);
         }
         else {
-                lang = act_user_get_language (user);
+                lang = g_strdup (act_user_get_language (user));
                 if (!lang) {
                         lang = cc_common_language_get_current_language ();
                 }