message: Fix: The invariant mass histograms are empty
diff: @@ -3925,6 +3925,7 @@ void AliAnalysisTaskGammaConvV1::ProcessMCParticles()
  //________________________________________________________________________
  void AliAnalysisTaskGammaConvV1::CalculatePi0Candidates(){
  + if(fDoIsolatedAnalysis){
  if (fIsMC>0){
  if(!fAODMCTrackArray) fAODMCTrackArray = dynamic_cast<TClonesArray*>(fInputEvent->FindListObject(AliAODMCParticle::StdBranchName()));
  if (fAODMCTrackArray == NULL){
  @@ -3932,6 +3933,7 @@ void AliAnalysisTaskGammaConvV1::CalculatePi0Candidates(){
  return;
  }
  }
  + }
  // Conversion Gammas
  if(fGammaCandidates->GetEntries()>1){
  for(Int_t firstGammaIndex=0;firstGammaIndex<fGammaCandidates->GetEntries()-1;firstGammaIndex++){
  