Web service exception should return errorcode (from moodle exception)

<?xml version="1.0" encoding="UTF-8"?>

<EXCEPTION class="moodle_exception">

    <ERRORCODE>missingcourse</ERRORCODE>

    <MESSAGE>This is a not translated message</MESSAGE>

    <DEBUGINFO>This is a not translated message with more detailled info</DEBUGINFO>

</EXCEPTION>

public function fault($fault = null, $code = "Receiver")

    {

        //intercept any exceptions with debug info and transform it in Moodle exception

        if ($fault instanceof Exception) {

            //add the debuginfo to the exception message if debuginfo must be returned

            if (debugging() and isset($fault->debuginfo)) {

                $fault = new SoapFault($fault->errorcode, $fault->getMessage() . ' | DEBUG INFO: ' . $fault->debuginfo); //HERE IS THE CHANGE $fault->errorcode PS: NOT TESTED ;)

            }

        }

        return parent::fault($fault, $code);

    }