[glib] message_to_write_data_free: Don't unref data->message if it is NULL

[Matthias Clasen <matthiasc src gnome org>]

commit fe1186a842458dcc647c5f9ab03f17c762354e95
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Sep 30 14:40:50 2010 -0400

    message_to_write_data_free: Don't unref data->message if it is NULL
    
    After the recent changes to message filtering, it can happen that
    data->message is NULL when we get here.

 gio/gdbusprivate.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/gio/gdbusprivate.c b/gio/gdbusprivate.c
index 442d5e1..dd9d58a 100644
--- a/gio/gdbusprivate.c
+++ b/gio/gdbusprivate.c
@@ -876,7 +876,8 @@ static void
 message_to_write_data_free (MessageToWriteData *data)
 {
   _g_dbus_worker_unref (data->worker);
-  g_object_unref (data->message);
+  if (data->message)
+    g_object_unref (data->message);
   g_free (data->blob);
   g_free (data);
 }