Bug 11633 : Block Issue if fines require staff override

If a patrons fines exceed noissuescharge and we allow
staff to allow issue at their discretion via an override
the SIP process allowed charges to go ahead.
This patch closes the loophole which allowed self issue
to subvert the usual library loan policy

Signed-off-by: Chris Cormack <chris@bigballofwax.co.nz>

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>

C4/SIP/ILS/Transaction/Checkout.pm

@@ -85,7 +85,9 @@ sub do_checkout {
             } elsif ($confirmation eq 'ISSUED_TO_ANOTHER') {
                 $self->screen_msg("Item already checked out to another patron.  Please return item for check-in.");
                 $noerror = 0;
-            } elsif ($confirmation eq 'DEBT') {     # don't do anything, it's the minor debt, and alarms fire elsewhere
+            } elsif ($confirmation eq 'DEBT') {
+                $self->screen_msg('Outstanding Fines block issue');
+                $noerror = 0;
             } elsif ($confirmation eq 'HIGHHOLDS') {
                 $overridden_duedate = $needsconfirmation->{$confirmation}->{returndate};
                 $self->screen_msg('Loan period reduced for high-demand item');