[gdm] manager: only claen up stub greeter display if it's actually a stub

[Ray Strode <halfline src gnome org>]

commit 6b15680efb6da56b0477848949d0ec99b3e3ffe6
Author: Ray Strode <rstrode redhat com>
Date:   Mon Sep 14 10:26:52 2015 -0400

    manager: only claen up stub greeter display if it's actually a stub
    
    commit 2774c7e43b9fdf5e5e59ef1f53ae7ba29f4aa23c fixed a leak in the
    case we're doing autologin, but it also unconditionally cleans up
    the display in the non-autologin case, too.
    
    At the moment, we don't want to clean up the greeter in that case,
    since it causes unnecessary flicker and slows down fast user switching.
    ( though this behavior may get changed again pending the outcome of
      bug 747339 )
    
    This commit makes sure we only clean up the leaker greeter display, if
    there is a leaked greeter display (namely, the autologin case)
    
    https://bugzilla.gnome.org/show_bug.cgi?id=749418

 daemon/gdm-manager.c |   10 ++++++----
 1 files changed, 6 insertions(+), 4 deletions(-)
---
diff --git a/daemon/gdm-manager.c b/daemon/gdm-manager.c
index 2698125..7602e75 100644
--- a/daemon/gdm-manager.c
+++ b/daemon/gdm-manager.c
@@ -1598,10 +1598,12 @@ on_start_user_session (StartUserSessionOperation *operation)
                 g_object_set_data (G_OBJECT (operation->session), "gdm-display", NULL);
                 create_embryonic_user_session_for_display (operation->manager, display, allowed_uid);
 
-                /* remove the unused prepared greeter display since we're not going
-                 * to have a greeter */
-                gdm_display_store_remove (self->priv->display_store, display);
-                g_object_unref (display);
+                if (g_strcmp0 (operation->service_name, "gdm-autologin") == 0) {
+                        /* remove the unused prepared greeter display since we're not going
+                         * to have a greeter */
+                        gdm_display_store_remove (self->priv->display_store, display);
+                        g_object_unref (display);
+                }
 
                 /* Give the user session a new display object for bookkeeping purposes */
                 session_id = gdm_session_get_conversation_session_id (operation->session,