function tableCheckup() {
    global $db, $sniffer;
    $fieldOkay1 = (method_exists($sniffer, 'field_type')) ? $sniffer->field_type(TABLE_AUTHORIZENET, 'transaction_id', 'bigint(20)', true) : -1;
    if ($fieldOkay1 !== true) {
      $db->Execute("ALTER TABLE " . TABLE_AUTHORIZENET . " CHANGE transaction_id transaction_id bigint(20) default NULL");
    }
  }