message: Fix Mixing issue
diff: @@ -792,13 +792,13 @@ Bool_t AliAnalysisTaskXi1530::GoodTracksSelection() {
  goodtrackindices.push_back(it);
  // Event mixing pool
  - if (fsetmixing){
  + if ((centbin >= 0) && (zbin >= 0) && fsetmixing) {
  AliVTrack* track_mix = (AliVTrack*)fEvt->GetTrack(it);
  etl->push_back((AliVTrack*)track_mix->Clone());
  }
  }
  - if (fsetmixing) {
  + if ((centbin >= 0) && (zbin >= 0) && fsetmixing) {
  if (!goodtrackindices.size())
  ep->pop_back();
  if (ep->size() > (int)fnMix) {
  