Merge branch 'clang10.xAODBTaggingEfficiency-20201210' into 'master'

xAODBTaggingEfficiency: Fix clang 10 warning.

See merge request atlas/athena!39092

PhysicsAnalysis/JetTagging/JetTagPerformanceCalibration/xAODBTaggingEfficiency/Root/BTaggingTruthTaggingTool.cxx

@@ -1104,7 +1104,7 @@ StatusCode BTaggingTruthTaggingTool::getDirectTaggedJets(TRFinfo &trfinf,std::ve
   is_tagged.clear();
   std::vector<int> appo;
   
-  for(const auto jet : trfinf.jets) {
+  for(const auto& jet : trfinf.jets) {
     ATH_MSG_DEBUG("pt " << jet.vars.jetPt << "   eta " << jet.vars.jetEta << "   wei " << jet.vars.jetTagWeight);
     bool is_btagged = false;
     if(!m_continuous)