message: avoid implicit conversion that root6 does not like
diff: @@ -80,7 +80,7 @@ AliAnalysisTaskRho* AddTaskRhoNew(
  name += suffix;
  }
  - AliAnalysisTaskRho* mgrTask = mgr->GetTask(name.Data());
  + AliAnalysisTaskRho* mgrTask = (AliAnalysisTaskRho*)(mgr->GetTask(name.Data()));
  if (mgrTask) return mgrTask;
  AliAnalysisTaskRho *rhotask = new AliAnalysisTaskRho(name, histo);
  