[Koha-patches] Hourly Loan Fines not working [patch]

[Elliott Davis]

Add private function to calculate chargeable units and reconfigure Koha/Calendar.pm to use this function.

To test:

Check out an hourly item, manipulate the database to backdate the checkin or let the item go overdue whilst enjoying a sandwich.  After the Item is overdue Check the item back in and wait for the fines cron job to run (or run it yourself).  You should see a fine assessed for this item.