message: Update ClassDef after yesterday PR
  This is required to avoid weird errors when launching tasks with outdated AliPhysics versions
diff: @@ -351,7 +351,7 @@ private:
  AliMultSelectionTask(const AliMultSelectionTask&); // not implemented
  AliMultSelectionTask& operator=(const AliMultSelectionTask&); // not implemented
  - ClassDef(AliMultSelectionTask, 5);
  + ClassDef(AliMultSelectionTask, 6);
  //3 - extra QA histograms
  };
  