Bug 8770 - amount does not equal amountoutstanding on a fine with no payments or credits

If a lost item fee is owed and partially paid off when an item is
returned and a refund is processed, Koha tries to pay off existing
fees before adding any leftover balance as a credit on the account.

However, those fee payments aren't actually processed, due to a bug
where the accountnumber was quoted as a string literal, and thus the
for the fee payment would fail. This did not result in an DB error,
as the query was still valid SQL. Checking the return value of the
query would have revealed that the accountline had not been updated.

History:
This bug was introduced on April 23, 2007 with the commit
'reintroducing fixaccountforlostandreturned as requested by rosalie'.
Commit id 111d590e9cdaf801256822e23f170bfc2365338f

On July 30, 2009 the error was flagged with a FIXME and remained
in that state until now.
Commit id 51e8fc2cb6a0cf79f19206c822a4361aeca6f63f

Test plan:
1) Create a test patron
2) Check out an item to that patron and give it a due date in the past
3) Run fines.pl to generate the fine for the item
4) Mark the item long overdue on the item tab (not in edit items)
5) Pay for the lost item
6) Check the item back in
7) Note the incorrect fines. Only the lost fee balance  due is refunded,
   not the entire lost fee, but no other fees are paid off.
8) Apply the patch
9) Repeat steps 1-6, then not the fines are paid correctly

Signed-off-by: Chris Cormack <chris@bigballofwax.co.nz>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Totel due is correct after applying the patch.
All tests and QA script pass.

Signed-off-by: Galen Charlton <gmc@esilibrary.com>
Merge remote branch 'origin/new/bug_8770'