message: Set default values in header in PopulationPool
diff: @@ -21,9 +21,9 @@ public:
  int populationEmployed();
  private:
  - int mScientistsAsWorkers;
  - int mScientistsUsed;
  - int mWorkersUsed;
  + int mScientistsAsWorkers{0};
  + int mScientistsUsed{0};
  + int mWorkersUsed{0};
  - Population* mPopulation;
  + Population* mPopulation{nullptr};
  };
  