[brasero] Fixed a warning

[Philippe Rouquier <philippr src gnome org>]

commit 8a360b21b9bb8a07947a020c69f1d535800ae2ea
Author: Philippe Rouquier <bonfire-app wanadoo fr>
Date:   Wed May 13 13:39:28 2009 +0200

    Fixed a warning
---
 libbrasero-utils/brasero-io.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/libbrasero-utils/brasero-io.c b/libbrasero-utils/brasero-io.c
index ab734ed..a27ae5f 100644
--- a/libbrasero-utils/brasero-io.c
+++ b/libbrasero-utils/brasero-io.c
@@ -2409,7 +2409,7 @@ void
 brasero_io_shutdown (void)
 {
 	if (singleton) {
-		singleton = NULL;
 		g_object_unref (singleton);
+		singleton = NULL;
 	}
 }