message: add missing protection on uninitialized histograms when opening angle cut studies is not requested
diff: @@ -2937,7 +2937,7 @@ void AliAnaPi0::FillAcceptanceHistograms()
  if(fFillAngleHisto)
  fhPrimPi0OpeningAnglePhotonCuts->Fill(mesonPt, angle, GetEventWeight()*weightPt);
  - if(fNAngleCutBins > 0)
  + if ( fNAngleCutBins > 0 && fFillOpAngleCutHisto )
  {
  Int_t angleBin = -1;
  for(Int_t ibin = 0; ibin < fNAngleCutBins; ibin++)
  @@ -2985,7 +2985,7 @@ void AliAnaPi0::FillAcceptanceHistograms()
  if(fFillAngleHisto)
  fhPrimEtaOpeningAnglePhotonCuts->Fill(mesonPt, angle, GetEventWeight()*weightPt);
  - if(fNAngleCutBins > 0)
  + if ( fNAngleCutBins > 0 && fFillOpAngleCutHisto )
  {
  Int_t angleBin = -1;
  for(Int_t ibin = 0; ibin < fNAngleCutBins; ibin++)
  