message: Implement GetSign to have consistent interface between ESD / AOD tracks
diff: @@ -189,6 +189,7 @@ class AliAODTrack : public AliVTrack {
  virtual Double_t Eta() const { return -TMath::Log(TMath::Tan(0.5 * fMomentum[2])); }
  + virtual Double_t GetSign() const { return fCharge > 0 ? 1 : -1; }
  virtual Short_t Charge() const {return fCharge; }
  virtual Bool_t PropagateToDCA(const AliVVertex *vtx,
  