Fix bin limits for event-plane angle in charm polarisation task

Author: fgrosa

PWGHF/D2H/Tasks/taskCharmPolarisation.cxx

@@ -679,7 +679,7 @@ struct HfTaskCharmPolarisation {
     /// Event-plane related histograms
     if (doprocessResolEventPlane) {
       const AxisSpec axisCosDeltaPhi{1000, -1., 1., "cos(2(#Psi_{2}(A) #minus #Psi_{2}(B)))"};
-      const AxisSpec axisPsi{180, 0., o2::constants::math::PI, "#Psi_{2}"};
+      const AxisSpec axisPsi{180, -o2::constants::math::PIHalf, o2::constants::math::PIHalf, "#Psi_{2}"};
 
       registry.add("resolEvPlane/hEvPlaneAngleFV0A", ";centrality;#Psi_{2} (FV0A)", {HistType::kTH2F, {thnAxisCentrality, axisPsi}});
       registry.add("resolEvPlane/hEvPlaneAngleFT0A", ";centrality;#Psi_{2} (FT0A)", {HistType::kTH2F, {thnAxisCentrality, axisPsi}});