Getting keys with limit=0 fails

Hi,

The _uc_product_keys_db_get_keys() fails if the $limit parameter is 0.

  if ($limit > 0) {
    $result = pager_query($query, $limit, 0, null, $value);
  }
  else {
    $result = db_query($query . $value);
  }

A comma would be better:

    $result = db_query($query , $value);

Thanks,
Gabor