Fix Fatal error in Protocol\OStatus (#5450)

diff --git a/src/Protocol/OStatus.php b/src/Protocol/OStatus.php
index f30add32b7ab701a98b4496d8be38e0e73721ba1..c7c609f3b9b462406dd865f4cd1f3a693a48b5dc 100644 (file)
--- a/src/Protocol/OStatus.php
+++ b/src/Protocol/OStatus.php
@@ -303,7 +303,7 @@ class OStatus
         *
         * @return boolean Could the XML be processed?
         */
-       private static function process($xml, array $importer, array &$contact, &$hub, $stored = false, $initialize = true)
+       private static function process($xml, array $importer, array &$contact = null, &$hub, $stored = false, $initialize = true)
        {
                if ($initialize) {
                        self::$itemlist = [];