message: fix minor bug in MCflag
diff: @@ -1894,6 +1894,7 @@ void AliAnalysisTaskXi1530PbPb::FillNtuples() {
  if (fIsMC) {
  if (IsTrueXi1530(fGoodXiArray[i], fGoodTrackArray[j]))
  tmp[25] = 1; // MCflag Xi1530
  + else
  tmp[25] = 2; // MCflag -> not true
  } else
  tmp[25] = 0; // MCflag -> data
  