message: add setters for downscaling factor
diff: @@ -128,6 +128,9 @@ public:
  void SetDownscaling(bool down) { fDownscaling = down; }
  + void SetDownscalingFactorByEvent(bool fraction) { fDownscalingFactorByEvent = fraction; }
  + void SetDownscalingFactorByCandidate(bool fraction) { fDownscalingFactorByCandidate = fraction; }
  +
  void SetOnlyTrueCandidates(bool trueCand) { fOnlyTrueCandidates = trueCand; }
  void SetMinCandidatePt(float lPtMin) { fMinCanidatePtToSave = lPtMin; }
  