gfileutils: Remove extra fclose()

This is a regression introduced by:
commit 6ac8e6108cf15884e28fe1ecd3042dfce0e11dfd
Author: Matthias Clasen <mclasen@redhat.com>
Date:   Tue Jun 14 10:12:46 2011 -0400

    Don't leak resources in error cases

glib/gfileutils.c

@@ -1166,7 +1166,6 @@ write_to_temp_file (const gchar  *contents,
 		   display_name, 
 		   g_strerror (save_errno));
 
-      fclose (file);
       g_unlink (tmp_name);
       
       goto out;