php error when no aliases

include/network.php

@@ -536,7 +536,7 @@ function fetch_xrd_links($url) {
 			$aliases = array($alias);
 		else
 			$aliases = $alias;
-		if(count($aliases)) {
+		if($aliases && count($aliases)) {
 			foreach($aliases as $alias) {
 				$links[]['@attributes'] = array('rel' => 'alias' , 'href' => $alias);
 			}