rel #17017 : MappedSoapClient guard on types

library/Class/WebService/MappedSoapClient.php

@@ -47,6 +47,9 @@ class Class_WebService_MappedSoapClient extends SoapClient {
 
 
 	protected function __getWSDLStructTypes() {
+		if (!$this->__getTypes())
+			return [];
+
 		$types = [];
 		foreach($this->__getTypes() as $type) {
 			preg_match('/([a-z0-9_]+)\s+([a-z0-9_]+(\[\])?)(.*)?/si', $type, $matches);