[PWGEM,PWGEM-36] Fix filling of hQVecMeanRVsPhi histos

- Fix missing filling value for the `hQVecMeanRVsPhi` histograms

Author: mhemmer-cern

PWGEM/PhotonMeson/Tasks/taskPi0FlowEMC.cxx

@@ -1245,12 +1245,12 @@ struct TaskPi0FlowEMC {
       registry.fill(HIST("hEventPlaneAngleTPCpos"), centrality, epBPoss);
       registry.fill(HIST("hEventPlaneAngleTPCneg"), centrality, epBNegs);
 
-      registry.fill(HIST("QVector/hQVecMeanRVsPhiFT0a"), centrality, std::atan2(yQVecFT0a, xQVecFT0a));
-      registry.fill(HIST("QVector/hQVecMeanRVsPhiFT0c"), centrality, std::atan2(yQVecFT0c, xQVecFT0c));
-      registry.fill(HIST("QVector/hQVecMeanRVsPhiFT0m"), centrality, std::atan2(yQVecFT0m, xQVecFT0m));
-      registry.fill(HIST("QVector/hQVecMeanRVsPhiTPCpos"), centrality, std::atan2(yQVecBPos, xQVecBPos));
-      registry.fill(HIST("QVector/hQVecMeanRVsPhiTPCneg"), centrality, std::atan2(yQVecBNeg, xQVecBNeg));
-      registry.fill(HIST("QVector/hQVecMeanRVsPhiTPCTot"), centrality, std::atan2(yQVecBTot, xQVecBTot));
+      registry.fill(HIST("QVector/hQVecMeanRVsPhiFT0a"), centrality, std::atan2(yQVecFT0a, xQVecFT0a), std::hypot(xQVecFT0a, yQVecFT0a));
+      registry.fill(HIST("QVector/hQVecMeanRVsPhiFT0c"), centrality, std::atan2(yQVecFT0c, xQVecFT0c), std::hypot(xQVecFT0c, yQVecFT0c));
+      registry.fill(HIST("QVector/hQVecMeanRVsPhiFT0m"), centrality, std::atan2(yQVecFT0m, xQVecFT0m), std::hypot(xQVecFT0m, yQVecFT0m));
+      registry.fill(HIST("QVector/hQVecMeanRVsPhiTPCpos"), centrality, std::atan2(yQVecBPos, xQVecBPos), std::hypot(xQVecBPos, yQVecBPos));
+      registry.fill(HIST("QVector/hQVecMeanRVsPhiTPCneg"), centrality, std::atan2(yQVecBNeg, xQVecBNeg), std::hypot(xQVecBNeg, yQVecBNeg));
+      registry.fill(HIST("QVector/hQVecMeanRVsPhiTPCTot"), centrality, std::atan2(yQVecBTot, xQVecBTot), std::hypot(xQVecBTot, yQVecBTot));
 
       registry.fill(HIST("epReso/hEpResoFT0cFT0a"), centrality, std::cos(harmonic * getDeltaPsiInRange(epFT0c, epFT0a)));
       registry.fill(HIST("epReso/hEpResoFT0cTPCpos"), centrality, std::cos(harmonic * getDeltaPsiInRange(epFT0c, epBPoss)));