Recalculate the total population if restarting.
Recalculate the total population if restarting.

This is needed for calculations that restart from real populations with
integer populations as the truncation of the populations changes the
total.

hande-qmc/hande,ruthfranklin/hande,hande-qmc/hande,hande-qmc/hande,hande-qmc/hande,hande-qmc/hande