message: simplify logic in function Population::adults
diff: @@ -64,7 +64,7 @@ void Population::addPopulation(PopulationTable::Role role, int count)
  int Population::adults() const
  {
  - return mPopulation[PopulationTable::Role::Student] + mPopulation[PopulationTable::Role::Worker] + mPopulation[PopulationTable::Role::Scientist] + mPopulation[PopulationTable::Role::Retired];
  + return size() - size(PopulationTable::Role::Child);
  }
  