Bug 38284: Add patron check for TrackLastPatronActivityTriggers

Bug 38284: Add patron check for TrackLastPatronActivityTriggers

If an invalid or empty cardnumber is supplied to patron status request SIP message, SIP dies silently and no 'READ:' exists on the response.

Test plan:
1) Apply tests plan, run tests:
$ prove t/db_dependent/SIP/Message.t
2) Verify tests fail. Apply 2nd patch. Run tests again. Verify they pass.

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>