Throws an XML-RPC error.
$error: An error object or integer error code.
$message: (optional) The description of the error. Used only if an integer error code was passed in.
function xmlrpc_server_error($error, $message = FALSE) {
if ($message && !is_object($error)) {
$error = xmlrpc_error($error, $message);
}
xmlrpc_server_output(xmlrpc_error_get_xml($error));
}