[gnome-control-center] background: Fix compile-time warning with format

[Bastien Nocera <hadess src gnome org>]

commit 3840ef6539978229e0368e2cd990691fa68e536e
Author: Bastien Nocera <hadess hadess net>
Date:   Thu Jan 31 17:02:11 2013 +0100

    background: Fix compile-time warning with format

 panels/background/cc-background-item.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/panels/background/cc-background-item.c b/panels/background/cc-background-item.c
index d61aa0e..e48a2c4 100644
--- a/panels/background/cc-background-item.c
+++ b/panels/background/cc-background-item.c
@@ -896,7 +896,7 @@ cc_background_item_dump (CcBackgroundItem *item)
 	if (priv->mime_type)
 		g_debug ("mime-type:\t\t%s", priv->mime_type);
 	g_debug ("dimensions:\t\t%d x %d", priv->width, priv->height);
-        g_debug ("modified: %u", priv->modified);
+        g_debug ("modified: %"G_GUINT64_FORMAT, priv->modified);
 	g_debug (" ");
 }