[gdm] Remove warning. Fixes bug #596605.

[Brian Cameron <bcameron src gnome org>]

commit 5e499c1d02cd723786ec050b8536b7c8221919ef
Author: Brian Cameron <Brian Cameron sun com>
Date:   Mon Sep 28 16:21:06 2009 -0500

    Remove warning.  Fixes bug #596605.

 daemon/gdm-slave.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/daemon/gdm-slave.c b/daemon/gdm-slave.c
index 94a32ee..79bdfd1 100644
--- a/daemon/gdm-slave.c
+++ b/daemon/gdm-slave.c
@@ -836,6 +836,8 @@ gdm_slave_parse_enriched_login (GdmSlave *slave,
         } else {
                 return (g_strdup (username));
         }
+
+	return NULL;
 }
 
 gboolean