message: Use range-for loop in Population::size()
diff: @@ -77,11 +77,10 @@ void Population::addPopulation(PersonRole role, int count)
  int Population::size()
  {
  int count = 0;
  - for (std::size_t i = 0; i < mPopulation.size(); ++i)
  + for (auto& populationRole : mPopulation)
  {
  - count += mPopulation[i];
  + count += populationRole;
  }
  -
  return count;
  }
  