[tracker] tracker-extract: Fix memleak after own review, obvious one

[Philip Van Hoof <pvanhoof src gnome org>]

commit 908c84454f5905ca79059edf1b919ade7b7f2689
Author: Philip Van Hoof <philip codeminded be>
Date:   Sun Aug 21 12:16:31 2011 +0200

    tracker-extract: Fix memleak after own review, obvious one

 src/tracker-extract/tracker-albumart.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/tracker-extract/tracker-albumart.c b/src/tracker-extract/tracker-albumart.c
index 70b2fdb..34ba65b 100644
--- a/src/tracker-extract/tracker-albumart.c
+++ b/src/tracker-extract/tracker-albumart.c
@@ -102,6 +102,7 @@ file_get_checksum_if_exists (GChecksumType   checksum_type,
 	checksum = g_checksum_new (checksum_type);
 
 	if (!checksum) {
+		g_object_unref (file);
 		return FALSE;
 	}