[gdm] manager: NULL unreferenced objects in dispose

[Ray Strode <halfline src gnome org>]

commit b48e39e0dc7623ae728bbf4a928e150e0138d673
Author: Ray Strode <rstrode redhat com>
Date:   Mon Mar 30 19:17:21 2015 -0400

    manager: NULL unreferenced objects in dispose
    
    Now that we're using a dispose handler instead of a finalize handler,
    we need to make sure we nullify our objects after unrefing them.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=745975

 daemon/gdm-manager.c |   11 +++++++----
 1 files changed, 7 insertions(+), 4 deletions(-)
---
diff --git a/daemon/gdm-manager.c b/daemon/gdm-manager.c
index 7b2cf65..db008c0 100644
--- a/daemon/gdm-manager.c
+++ b/daemon/gdm-manager.c
@@ -2823,8 +2823,12 @@ gdm_manager_dispose (GObject *object)
         g_clear_object (&manager->priv->xdmcp_factory);
 #endif
         g_clear_object (&manager->priv->local_factory);
-        g_hash_table_unref (manager->priv->open_reauthentication_requests);
-        g_hash_table_unref (manager->priv->transient_sessions);
+        g_clear_pointer (&manager->priv->open_reauthentication_requests,
+                         (GDestroyNotify)
+                         g_hash_table_unref);
+        g_clear_pointer (&manager->priv->transient_sessions,
+                         (GDestroyNotify)
+                         g_hash_table_unref);
 
         g_list_foreach (manager->priv->user_sessions,
                         (GFunc) gdm_session_close,
@@ -2856,8 +2860,7 @@ gdm_manager_dispose (GObject *object)
 
         g_clear_object (&manager->priv->connection);
         g_clear_object (&manager->priv->object_manager);
-
-        g_object_unref (manager->priv->display_store);
+        g_clear_object (&manager->priv->display_store);
 
         G_OBJECT_CLASS (gdm_manager_parent_class)->dispose (object);
 }