message: Safety fix for D-h  offline correlator (0 efficiency weights)
diff: @@ -673,6 +673,7 @@ Double_t AliHFOfflineCorrelator::GetEfficiencyWeight(AliHFCorrelationBranchD *br
  if(fMapEffTr->IsBinUnderflow(binTr)||fMapEffTr->IsBinOverflow(binTr))return 1.;
  effTr = fMapEffTr->GetBinContent(binTr);
  + if(effD*effTr==0) return 1.; //safety fix
  return 1./(effD*effTr);
  }
  @@ -685,6 +686,7 @@ Double_t AliHFOfflineCorrelator::GetEfficiencyWeightDOnly(AliHFCorrelationBranch
  if(fMapEffD->IsBinUnderflow(binD)||fMapEffD->IsBinOverflow(binD))return 1.;
  effD = fMapEffD->GetBinContent(binD);
  + if(effD==0) return 1.; //safety fix
  return 1./(effD);
  }
  