[gnome-control-center] region-panel: do not show Login button if localed is not available

[Rui Matos <rtcm src gnome org>]

commit c5268f8a4b4c9c3ebbaf68321bca7c37a8d66caa
Author: Antoine Jacoutot <ajacoutot gnome org>
Date:   Tue Feb 4 15:09:48 2014 +0100

    region-panel: do not show Login button if localed is not available
    
    Missing org.freedesktop.locale1 means priv->permission will not be set
    and will trigger a segfault when used by set_login_button_visibility().
    Unconditionally not display the Login button if localed is not available
    since it will be useless anyway.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=723550

 panels/region/cc-region-panel.c |   15 ++++++++++++---
 1 files changed, 12 insertions(+), 3 deletions(-)
---
diff --git a/panels/region/cc-region-panel.c b/panels/region/cc-region-panel.c
index 78a90ca..564470c 100644
--- a/panels/region/cc-region-panel.c
+++ b/panels/region/cc-region-panel.c
@@ -174,8 +174,9 @@ cc_region_panel_constructed (GObject *object)
 
         G_OBJECT_CLASS (cc_region_panel_parent_class)->constructed (object);
 
-        cc_shell_embed_widget_in_header (cc_panel_get_shell (CC_PANEL (object)),
-                                         priv->login_button);
+        if (priv->permission)
+                cc_shell_embed_widget_in_header (cc_panel_get_shell (CC_PANEL (object)),
+                                                 priv->login_button);
 }
 
 static const char *
@@ -1746,8 +1747,16 @@ setup_login_button (CcRegionPanel *self)
        CcRegionPanelPrivate *priv = self->priv;
         GDBusConnection *bus;
         gboolean loaded;
+        GError *error = NULL;
+
+        priv->permission = polkit_permission_new_sync ("org.freedesktop.locale1.set-locale", NULL, NULL, 
&error);
+        if (priv->permission == NULL) {
+                g_warning ("Could not get 'org.freedesktop.locale1.set-locale' permission: %s",
+                           error->message);
+                g_error_free (error);
+                return;
+        }
 
-        priv->permission = polkit_permission_new_sync ("org.freedesktop.locale1.set-locale", NULL, NULL, 
NULL);
         bus = g_bus_get_sync (G_BUS_TYPE_SYSTEM, NULL, NULL);
         g_dbus_proxy_new (bus,
                           G_DBUS_PROXY_FLAGS_GET_INVALIDATED_PROPERTIES,