Bug 20937: Truncate items for print notices when user has an email

Bug 20937: Truncate items for print notices when user has an email

To test:
 1 - Set PrintNoticesMaxLines to 1
 2 - Checkout 2 (or more) items to a patron and make them overdue to trigger a
notice
 3 - Make sure the patron has an email
 4 - Make sure the notice you are sending is set to 'print' as the type
 5 - Run overdue_notices.pl without the 'nomail' option
 6 - Find the message and note all items have been added
 7 - Apply patch
 8 - Clear the message queue
 9 - Re-run overdue_notices.pl
10 - Confirm the message now has only 1 item.
11 - Set PrintNoticesMaxLines to 0
12 - Clear the message queue
13 - Re-run overdue_notices.pl
14 - Confirm the message has 2 items as expected

Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>