message: Only fills the Event collection if at least one particle is identified
diff: @@ -145,8 +145,7 @@ void AliAnalysisTaskNanoLoton::UserCreateOutputObjects() {
  fPairCleaner = new AliFemtoDreamPairCleaner(2, 2,
  fConfig->GetMinimalBookingME());
  if (fConfig->GetUsePhiSpinning()) {
  - fSample = new AliFemtoDreamControlSample(
  - fConfig);
  + fSample = new AliFemtoDreamControlSample(fConfig);
  }
  }
  fEvent = new AliFemtoDreamEvent(true, !fisLightWeight,
  @@ -297,13 +296,14 @@ void AliAnalysisTaskNanoLoton::UserExec(Option_t *option) {
  fPairCleaner->StoreParticle(AntiProtons);
  fPairCleaner->StoreParticle(Lambdas);
  fPairCleaner->StoreParticle(AntiLambdas);
  -
  + if (fPairCleaner->GetCounter() > 0) {
  fPartColl->SetEvent(fPairCleaner->GetCleanParticles(), fEvent->GetZVertex(),
  fEvent->GetMultiplicity(), fEvent->GetV0MCentrality());
  if (fConfig->GetUsePhiSpinning()) {
  fSample->SetBField(fEvent->GetMagneticField());
  fSample->SetEvent(fPairCleaner->GetCleanParticles(), fEvent);
  }
  + }
  PostData(1, fEvtList);
  PostData(2, fProtonList);
  PostData(3, fAntiProtonList);
  