message: Simplify Population::clear()
diff: @@ -71,11 +71,10 @@ void Population::init()
  */
  void Population::clear()
  {
  - clearPopulationList(PersonRole::ROLE_CHILD);
  - clearPopulationList(PersonRole::ROLE_STUDENT);
  - clearPopulationList(PersonRole::ROLE_WORKER);
  - clearPopulationList(PersonRole::ROLE_SCIENTIST);
  - clearPopulationList(PersonRole::ROLE_RETIRED);
  + for (auto& populationRole : mPopulation)
  + {
  + populationRole = 0;
  + }
  }
  