[support] setting dst in url_alias table to 255 length

Hi there, I know it's bad practice but would there be any major implications (in e.g. updates) if I change the dst length in url_alias to 255 in stead of 128 ? My use case is that I have a bunch of aliassen based on menu_path (a product catalogue) and with the catalogue going up to 4 levels down the paths can get long (longer then 128). I know about this patch (http://drupal.org/node/288946), just want to figure out if this is "common" practice or a big nono. Tnx, Hans