Bug fix for CalendarDump flag.  Monthly fields were not being reset at the correct time.  Will move to subroutine in pkg/cal ASAP.  Thank JM for spotting problem.
Bug fix for CalendarDump flag.  Monthly fields were not being reset at
the correct time.  Will move to subroutine in pkg/cal ASAP.  Thank JM
for spotting problem.

altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h