message: Take the normalisation hist from the filter output
diff: #include <AliVEvent.h>
  #include <TChain.h>
  +#include <TFile.h>
  #include <TObject.h>
  #include <algorithm>
  @@ -67,14 +68,15 @@ void AliAnalysisTaskNanoAODnormalisation::FillHistograms(TH2D* candidate[2], TH2
  ::Warning("AliAnalysisTaskNanoAODnormalisation::FillHistograms","Missing input handler");
  return;
  }
  - TList* userInfo = handler->GetUserInfo();
  - if (!userInfo) {
  - ::Warning("AliAnalysisTaskNanoAODnormalisation::FillHistograms","Missing User Info");
  + TTree* tree = handler->GetTree();
  + if (!tree) {
  + ::Warning("AliAnalysisTaskNanoAODnormalisation::FillHistograms","Missing Tree");
  return;
  }
  + TFile* inputFile = tree->GetCurrentFile();
  for (int iF{0}; iF < 2; ++iF) {
  - AliNanoFilterNormalisation* normalisation = (AliNanoFilterNormalisation*)userInfo->FindObject(Form("NanoAOD%s_scaler",kNames[iF]));
  + AliNanoFilterNormalisation* normalisation = (AliNanoFilterNormalisation*)inputFile->Get(Form("NanoAODFilter/NanoAOD%s_scaler",kNames[iF]));
  if (!normalisation) {
  if (!iF)
  ::Fatal("AliAnalysisTaskNanoAODnormalisation::FillHistograms","Missing filtering scalers!");
  