message: Fill histograms only when initialized
diff: @@ -266,8 +266,10 @@ void AliSigma0PhotonMotherCuts::SigmaToLambdaGamma(
  if (invMass < fMassSigma + fSigmaMassCut &&
  invMass > fMassSigma - fSigmaMassCut) {
  fSigma.push_back(sigma);
  + if (!fIsLightweight) {
  fHistMassCutPt->Fill(pT);
  fHistEtaPhi->Fill(sigma.GetEta(), sigma.GetPhi());
  + }
  ++nSigma;
  }
  if (invMass < fMassSigma + fSidebandCutUp &&
  