BUG 13468: Overdue notice lists all checked out books

BUG 13468: Overdue notice lists all checked out books

This patch should fix the issue when running under 'triggered' mode

To test:

1) Run overdue_notices.pl -t -n [to output notices to command
line]
2) Note that the notices output, list ALL checked out items
3) Apply Patch
4) Run again
5) Note the difference

Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>
Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
Amended patch: remove space changes.

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