more error handling

include/conversation.php

@@ -250,7 +250,7 @@ function conversation(&$a, $items, $mode, $update, $preview = false) {
 	$threads = array();
 	$threadsid = -1;
 	
-	if(count($items)) {
+	if($items && count($items)) {
 
 		if($mode === 'network-new' || $mode === 'search' || $mode === 'community') {
 

include/network.php

@@ -364,6 +364,9 @@ function lrdd($uri, $debug = false) {
 
 	logger('lrdd: host_meta: ' . $xml, LOGGER_DATA);
 
+	if(! stristr($xml,'<xrd'))
+		return array();
+
 	$h = parse_xml_string($xml);
 	if(! $h)
 		return array();