[gnome-control-center] background: Avoid warning when XML file doesn't exist

[Bastien Nocera <hadess src gnome org>]

commit bad4e389efab7a9654fef5a77d5bb5c7892d3140
Author: Bastien Nocera <hadess hadess net>
Date:   Mon Feb 14 14:28:46 2011 +0000

    background: Avoid warning when XML file doesn't exist

 panels/background/cc-background-xml.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/panels/background/cc-background-xml.c b/panels/background/cc-background-xml.c
index 9e5b847..84ee0df 100644
--- a/panels/background/cc-background-xml.c
+++ b/panels/background/cc-background-xml.c
@@ -475,6 +475,9 @@ cc_background_xml_get_item (const char *filename)
 	CcBackgroundXml *xml;
 	CcBackgroundItem *item;
 
+	if (g_file_test (filename, G_FILE_TEST_IS_REGULAR) == FALSE)
+		return NULL;
+
 	xml = cc_background_xml_new ();
 	item = NULL;
 	g_signal_connect (G_OBJECT (xml), "added",