Bug 13330 - All overdue items with fines returned via checkouts table will have fines...

Bug 13330 - All overdue items with fines returned via checkouts table will have fines forgiven!

Due to a disconnect between how booleans are handled in Perl vs JSON,
all checkins done from the checkouts table will have fines forgiven!
This is because the parameters sent to svc/checkin are coded in JSON
and the JSON false is treated in Perl as the string 'false' which
evaluates to true!

Test Plan:
1) Find a patron with an overdue item that has a fine
2) Return the item via the checkouts table on circulation.pl or moremember.pl
3) Note the fine is forgiven
4) Apply this patch
5) Repeat steps 1-2
6) Note the fine is no longer forgiven

Signed-off-by: Liz Rea <liz@catalyst.net.nz>
Verified bug, fix corrects the problem.

Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Also tested waiving fines form the check-in page still works.
Passes tests and QA script.

Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>