Bug 16531: Circ overdue report is showing an empty table if no overdues

Bug 16531: Circ overdue report is showing an empty table if no overdues

EDIT: Comment 2
EDIT2: using noreport variable (Comment 5)

To test:
1) Ensure you have no items overdue
2) Go to Circ -> Circulation reports -> Overdues
3) Notice empty table, '0 items overdue' heading
4) Ensure syspref FilterBeforeOverdueReport is set to 'Don't require'
5) Apply patch and refresh page
6) Notice empty table is no longer showing and page says "There are no
   overdues"
7) Apply a filter to search
8) Page now says "There are no overdues matching your search" with a
   link to reset filter.
9) Click Reset filter -> confirm any filters you applied are cleared.
10) Set FilterBeforeOverdueReport to 'Require' and refresh overdue
    report
11) Page should say "Please choose one or more filters to proceed"
12) Check out an item to a member, ensure due date is a date that has
    passed (i.e. yesterday)
13) Refresh overdue report page
14) Page should still say "Please choose one or more filters to proceed"
15) Set FilterBeforeOverdueReport to 'Don't require'
16) Confirm table now shows correctly with '1 items overdue' heading
    etc.

Sponsored-by: Catalyst IT
Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
(cherry picked from commit b7c61a5d128cc3580ea3ee67bc29e02571923dd3)
Signed-off-by: Frédéric Demians <f.demians@tamil.fr>