message: EMCal Embed: Fix streaming issue
  Naively, I would have expected THistManager to not need to stream,
  but it seems that it has to for some reason. In any case, by streaming
  it, the code stops crashing after it is streamed.
diff: @@ -211,7 +211,7 @@ class AliAnalysisTaskEmcalEmbeddingHelper : public AliAnalysisTaskSE {
  Int_t fOffset ; //!<! Offset from fLowerEntry where the loop over the tree should start
  Int_t fMaxNumberOfFiles ; //!<! Max number of files that are in the TChain
  Int_t fFileNumber ; //!<! File number corresponding to the current tree
  - THistManager fHistManager ; //!<! Manages access to all histograms
  + THistManager fHistManager ; ///< Manages access to all histograms
  AliEmcalList *fOutput ; //!<! List which owns the output histograms to be saved
  AliVEvent *fExternalEvent ; //!<! Current external event available for embedding
  AliVHeader *fExternalHeader ; //!<! Header of the current external event
  