message: Add handling of no TPC PID case
diff: @@ -553,6 +553,7 @@ double AliHFTreeHandler::CombineNsigmaDiffDet(double nsigmaTPC, double nsigmaTOF
  {
  if(nsigmaTPC > -998. && nsigmaTOF > -998.) return TMath::Sqrt((nsigmaTPC*nsigmaTPC+nsigmaTOF*nsigmaTOF)/2);
  else if(nsigmaTPC > -998. && nsigmaTOF < -998.) return nsigmaTPC;
  + else if(nsigmaTPC < -998. && nsigmaTOF > -998.) return nsigmaTOF;
  else return -9999.;
  }
  