[gdm] daemon: use g_clear_object to reduce clutter

[Ray Strode <halfline src gnome org>]

commit 3760fa4c3038018fd85603eaa9fe5356ffb9a352
Author: Ray Strode <rstrode redhat com>
Date:   Tue Sep 16 17:09:12 2014 -0400

    daemon: use g_clear_object to reduce clutter

 daemon/gdm-session-settings.c |    6 ++----
 1 files changed, 2 insertions(+), 4 deletions(-)
---
diff --git a/daemon/gdm-session-settings.c b/daemon/gdm-session-settings.c
index 56a6ab3..933f095 100644
--- a/daemon/gdm-session-settings.c
+++ b/daemon/gdm-session-settings.c
@@ -313,10 +313,8 @@ gdm_session_settings_load (GdmSessionSettings  *settings,
 
         settings->priv->user = act_user_manager_get_user (settings->priv->user_manager,
                                                           username);
-        if (old_user != NULL) {
-                g_object_unref (old_user);
-                old_user = NULL;
-        }
+
+        g_clear_object (&old_user);
 
         if (!act_user_is_loaded (settings->priv->user)) {
                 g_signal_connect (settings->priv->user,