url = rewritten_url;
        }
 
-       walker = get_http_walker(url);
+       walker = get_http_walker(url, NULL);
        walker->get_tree = get_tree;
        walker->get_history = get_history;
        walker->get_all = get_all;
 
        walker_free(walker);
 
-       if (rewritten_url)
-               free(rewritten_url);
+       free(rewritten_url);
 
        return rc;
 }