message: check buffer pointer
  Check var pointers
diff: @@ -1268,6 +1268,10 @@ TObjArray * AliTreePlayer::MakeHistograms(TTree * tree, TString hisString, TStr
  }
  }
  // 2.3 fill histograms
  + if (tree->GetVal(0)==NULL){
  + ::Error(" AliTreePlayer::MakeHistograms","Info not available"); // TODO - fix the logic
  + continue;
  + }
  Double_t values[kMaxDim];
  for (Int_t iHis=0; iHis<nHistograms; iHis++){
  Int_t indeces[kMaxDim+1];
  @@ -1288,6 +1292,10 @@ TObjArray * AliTreePlayer::MakeHistograms(TTree * tree, TString hisString, TStr
  THnBase * his = (THnBase*) hisArray->UncheckedAt(iHis);
  for (Int_t cEvent=0; cEvent<qLength; cEvent++){
  for (Int_t iDim=0; iDim<hisDims[iHis]; iDim++){
  + if (tree->GetVal(indeces[iDim])==NULL){
  + ::Error(" AliTreePlayer::MakeHistograms","Info %d not avaliable",iDim); // TODO - fix the logic
  + continue;
  + }
  values[iDim]=tree->GetVal(indeces[iDim])[cEvent];
  }
  Double_t weight=(indexW<0)? 1: tree->GetVal(indexW)[cEvent];
  