message: revert mix trigger
diff: @@ -695,7 +695,7 @@ void AliAnalysisTaskXi1530::UserExec(Option_t*) {
  else
  this->FillTracksAOD(); // Fill the histogram(AOD)
  }
  - if (fsetmixing && checkPionTrack)
  + if (fsetmixing && goodtrackindices.size())
  FillTrackToEventPool(); // use only pion track pool.
  }
  // ***********************************************************************
  