error while removing old orders

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I got several mails about error's like that:
Warning: sprintf(): Too few arguments in db_cart_class.php on line 93 (or line 92).

I noticed that the method "remove_old_orders" is a little wrong. I modified the code into this and should work now:

function remove_old_orders($customer, $remove_only_zeros = true) {
      if (RECOVER_ORDER && $customer > 0) {
         $sql = sprintf("DELETE FROM %s WHERE open = 'y' AND customer = %d AND order_date < (NOW() - %d)", ORDERS, $customer, VALID_UNTIL * 86400);
      } else {
         $sql = sprintf("DELETE FROM %s WHERE open = 'y' AND order_date < (NOW() - %d)", ORDERS, VALID_UNTIL * 86400);
      }
      $sql .= ($remove_only_zeros) ? " AND customer = 0" : "";
      mysql_query($sql);
   }

This bugfix will be available in the next release (version 1.12).

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