bugfix: Discopower ignored filtering of hide.from.discovery metadata property

modules/discopower/lib/PowerIdPDisco.php

@@ -186,7 +186,7 @@ class sspmod_discopower_PowerIdPDisco extends SimpleSAML_XHTML_IdPDisco
      */
     protected function filterList($list)
     {
-        parent::filterList($list);
+        $list = parent::filterList($list);
 
         try {
             $spmd = $this->metadata->getMetaData($this->spEntityId, 'saml20-sp-remote');