PatientSetService getCurrentStates method errors if passed an empty cohort

The getCurrentStates method in the HibernatePatientSetDAO class throws sql exceptions if the following restriction is added

criteria.createCriteria("patientProgram").add(Restrictions.in("patient.personId", ps.getMemberIds())); (Line 1782)

when passed an empty cohort.

If an empty cohort is passed this method should return an empty map.