Caller ID Superfecta

Line 29 should be $res not $check, else the following Apache errors show up:

PHP Notice:  Undefined variable: check in /var/www/html/admin/modules/superfecta/bin/source-Superfecta_Cache.php on line 29

The code:

    //query cache
    $sql = "SELECT callerid FROM superfectacache WHERE number = '$thenumber'";
    $res = $db->getOne($sql);
    if (DB::IsError($check))
    {
        die_freepbx( "Error: " . $res->getMessage() .  "<br>");
    }