message: Getter and Setter as suggested by
diff: @@ -33,7 +33,8 @@ class AliGenReadersEMD : public AliGenReader
  void TrackAll() {fPcToTrack = kAll;}
  void SetStartEvent(Int_t nev) {fStartEvent = nev;}
  void SetNtupleName(TString s) {fNtupleName=s;}
  - void SetInvertPz() {fInvertPz=kTRUE;}
  + void SetInvertPz(Bool_t invert = kTrue) {fInvertPz=invert;}
  + Bool_t GetInvertPz() const { return fInvertPz; }
  protected:
  Int_t fStartEvent; // points to the first event to read
  