Update staff action before calling dealtWithPatient

This fixes a problem, where the doctor was stuck in psychiatry.
Before this commit, the action of the doctor was set to 'meander'
*after* the dealtWithPatient() function was called (which, in turn,
called findWorkForStaff()). The call dispatcher then skipped that doctor.
Merge pull request #365 from phillipp/doctor-stuck-in-psych

Update staff action before calling dealtWithPatient