added const references for non-modified iterators

Author: alcaliva

PWGLF/Tasks/Strangeness/strangenessInJets.cxx

@@ -1107,7 +1107,7 @@ struct StrangenessInJets {
     std::vector<TVector3> ue1;
     std::vector<TVector3> ue2;
 
-    for (auto& jet : jets) {
+    for (const auto& jet : jets) {
 
       // jet must be fully contained in the acceptance
       if ((std::fabs(jet.eta()) + rJet) > (etaMax - deltaEtaEdge))
@@ -2095,7 +2095,7 @@ struct StrangenessInJets {
       std::vector<TVector3> ue1;
       std::vector<TVector3> ue2;
 
-      for (auto& jet : jets) {
+      for (const auto& jet : jets) {
 
         // jet must be fully contained in the acceptance
         if ((std::fabs(jet.eta()) + rJet) > (etaMax - deltaEtaEdge))