Possible typo in Tools::getValue(..)

[nikoz07]

Greetings!

I am diving into PrestaShop code and stumbled across this line in the getValue(..) function (line 462 of Tools.php, PS version 1.6):

        if (is_string($ret)) {
            return stripslashes(urldecode(preg_replace('/((\%5C0+)|(\%00+))/i', '', urlencode($ret))));
        }

Is there some mistake in the first URL encoding - there should be 2 digits, right? Or are we looking for %5C (a backslash) and a number of 0's?