[gdm] Don't call update_item_for_user on non-users in userlist

[Ray Strode <halfline src gnome org>]

commit 9027a2cb3db2bbf603540b97ee1398a90053a026
Author: Ray Strode <rstrode redhat com>
Date:   Mon Sep 13 10:19:13 2010 -0400

    Don't call update_item_for_user on non-users in userlist
    
    Previously, get_user() it would fail right away and we
    would avoid the call.  Now get_user() returns a unloaded
    stub object so we need to avoid calling get_user() in the
    first place.

 gui/simple-greeter/gdm-user-chooser-widget.c |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)
---
diff --git a/gui/simple-greeter/gdm-user-chooser-widget.c b/gui/simple-greeter/gdm-user-chooser-widget.c
index 211b033..5aa2cfa 100644
--- a/gui/simple-greeter/gdm-user-chooser-widget.c
+++ b/gui/simple-greeter/gdm-user-chooser-widget.c
@@ -235,6 +235,14 @@ on_item_load (GdmChooserWidget     *widget,
                 return;
         }
 
+        if (strcmp (id, GDM_USER_CHOOSER_USER_OTHER) == 0) {
+                return;
+        }
+
+        if (strcmp (id, GDM_USER_CHOOSER_USER_GUEST) == 0) {
+                return;
+        }
+
         user = gdm_user_manager_get_user (user_chooser->priv->manager, id);
         if (user != NULL) {
                 update_item_for_user (user_chooser, user);