dns_get_record waring fix

added dictionary key checks before

carddav_discovery.php

@@ -87,6 +87,9 @@ public function find_addressbooks($url, $user, $password)
 
 	// now check each of them until we find something (or don't)
 	foreach($services as $service) {
+		if (!array_key_exists('paths', $service)) {
+			continue;
+		}
 		$cdfopen_cfg['url'] = $service['baseurl'];
 
 		foreach($service['paths'] as $path) {
@@ -244,6 +247,9 @@ private function find_servers($host, $ssl)
 	private function find_baseurls($services)
 	{{{
 	foreach($services as &$service) {
+		if (!array_key_exists('dnssrv', $service)) {
+			continue;
+		}
 		$baseurl = $service['baseurl'];
 		$dnssrv  = $service['dnssrv'];