message: Re-use killRole in killChildren
  ... we really need to rename that method. Just saying.
diff: @@ -134,19 +134,11 @@ void Population::spawnRetiree()
  void Population::killChildren(int morale, int nurseries)
  {
  - mPopulationDeath.child += mPopulation.child;
  -
  int divisor = moraleModifierTable[moraleIndex(morale)].mortalityRate + (nurseries * 10);
  -
  - int deaths = std::min(mPopulationDeath.child / divisor, mPopulation.child);
  - mPopulationDeath.child = mPopulationDeath.child % divisor;
  -
  - mPopulation.child -= deaths;
  - mDeathCount += deaths;
  + killRole(PopulationTable::Role::Child, divisor);
  if (mPopulation.child <= 0)
  {
  - mPopulationDeath.child = 0;
  mPopulationGrowth.student = 0;
  }
  }
  