fix magic number issue

Author: maciacco

PWGLF/TableProducer/Nuspex/ebyeMaker.cxx

@@ -158,6 +158,12 @@ enum PartTypes {
   kPhysPrim = BIT(22)
 };
 
+enum TrackCharge {
+  kAll = 0,
+  kNegative = 1,
+  kPositive = 2
+}
+
 struct EbyeMaker {
   Produces<aod::CollEbyeTable> collisionEbyeTable;
   Produces<aod::MiniCollTable> miniCollTable;
@@ -571,7 +577,7 @@ struct EbyeMaker {
         continue;
       }
       histos.fill(HIST("QA/tpcSignal"), track.tpcInnerParam(), track.tpcSignal());
-      if (trackPt > ptMin[0] && trackPt < ptMax[0] && ((track.sign() < 0 && countOnlyLSTrk == 1) || (track.sign() > 0 && countOnlyLSTrk == 2) || (countOnlyLSTrk == 0)))
+      if (trackPt > ptMin[0] && trackPt < ptMax[0] && ((track.sign() < 0 && countOnlyLSTrk == TrackCharge::kNegative) || (track.sign() > 0 && countOnlyLSTrk == TrackCharge::kPositive) || (countOnlyLSTrk == TrackCharge::kAll)))
         nTracksColl++;
 
       for (int iP{0}; iP < kNpart; ++iP) {
@@ -856,7 +862,7 @@ struct EbyeMaker {
       auto genPt = std::hypot(mcPart.px(), mcPart.py());
       if ((std::abs(pdgCode) == PDG_t::kPiPlus || std::abs(pdgCode) == PDG_t::kElectron || std::abs(pdgCode) == PDG_t::kMuonMinus || std::abs(pdgCode) == PDG_t::kKPlus || std::abs(pdgCode) == PDG_t::kProton) && mcPart.isPhysicalPrimary() && genPt > ptMin[0] && genPt < ptMax[0]) {
         int ch = (pdgCode == PDG_t::kPiPlus || pdgCode == -PDG_t::kElectron || pdgCode == -PDG_t::kMuonMinus || pdgCode == PDG_t::kKPlus || pdgCode == PDG_t::kProton) ? 1 : -1;
-        if ((ch < 0 && countOnlyLSTrk == 1) || (ch > 0 && countOnlyLSTrk == 2) || (countOnlyLSTrk == 0))
+        if ((ch < 0 && countOnlyLSTrk == TrackCharge::kNegative) || (ch > 0 && countOnlyLSTrk == TrackCharge::kPositive) || (countOnlyLSTrk == TrackCharge::kAll))
           nChPartGen++;
       }
       if (std::abs(pdgCode) == PDG_t::kLambda0) {