Bug 13679 : Bug in listing overdues

Bug 13679 : Bug in listing overdues

To test
1/ Create some overdues and some issues due in the future
2/ Run the overdues script
3/ Notice item due in the future is in the list
4/ Apply patch
5/ Run script again
6/ Notice in the future not in the list

Signed-off-by: Nick <Nick@quechelibrary.org>
Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>
(cherry picked from commit 07f9dd9f8c2abb43a031c91449661a779ff53746)
Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>