message: Place member TH1 to top root directory
  Histograms created in some directory is destroyed when the directory is deleted. To avoid
  invalid pointers the histos should be placed in the top ROOT dir.
diff: @@ -69,6 +69,7 @@ AliHLTVZEROOnlineCalibComponent::AliHLTVZEROOnlineCalibComponent() :
  // visit http://web.ift.uib.no/~kjeks/doc/alice-hlt
  //
  // NOTE: all helper classes should be instantiated in DoInit()
  + fHistMult.SetDirectory(0);
  }
  // #################################################################################
  