message: Use NContributor getter
diff: @@ -929,9 +929,7 @@ void AliAnalysisTaskAO2Dconverter::FillEventInTF()
  collision.fFlags = vertexType;
  collision.fChi2 = AliMathBase::TruncateFloatFraction(pvtx->GetChi2(), mCollisionPositionCov);
  -
  - int nContributors = (pvtx->GetNDF() + 3) / 2;
  - collision.fN = (nContributors > USHRT_MAX) ? USHRT_MAX : nContributors;
  + collision.fN = (pvtx->GetNContributors() > USHRT_MAX) ? USHRT_MAX : pvtx->GetNContributors();
  Float_t eventTime[10];
  Float_t eventTimeRes[10];
  