message: Return TVector3 ref in methods of AliPicoV0
  const TVector3 &KinePos() const { return fP3Pos; }
  const TVector3 &KineNeg() const { return fP3Neg; }
diff: @@ -31,8 +31,8 @@ class AliPicoV0 : public TObject {
  virtual ~AliPicoV0();
  //=============================================================================
  - const TVector3 KinePos() const { return fP3Pos; }
  - const TVector3 KineNeg() const { return fP3Neg; }
  + const TVector3 &KinePos() const { return fP3Pos; }
  + const TVector3 &KineNeg() const { return fP3Neg; }
  const TVector3 KineRD() const { return (fP3Pos + fP3Neg); }
  const TLorentzVector KineKshort() const;
  