Bug 23103: Cannot checkin items lost by deleted patrons with fines attached

Bug 23103: Cannot checkin items lost by deleted patrons with fines attached

Test Plan:
1) Checkout an item to a patron
2) Ensure the item has a replacement cost (or itemtype has default)
3) Ensure patrons are charged when items lost
4) Mark the item lost
5) Confirm patron has a fine
6) Write off the fine
7) Delete the patron
8) Check in the item
9) Note the internal server error
10) Apply this patch
11) Repeat steps 1-8
12) Note there is no internal server error!
13) prove t/db_dependent/Circulation.t

Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>