fix zdc gapside selection

Author: miedema-11

PWGUD/Tasks/flowCorrelationsUpc.cxx

@@ -264,13 +264,13 @@ struct FlowCorrelationsUpc {
       registry.fill(HIST("neutronClass"), 0, 0);
     }
     if (std::abs(timeZNA) <= cfgZdcTimeCut && std::abs(timeZNC) > cfgZdcTimeCut) {
-      neutronClass = 1;
-      registry.fill(HIST("neutronClass"), 0, 1);
-    }
-    if (std::abs(timeZNA) > cfgZdcTimeCut && std::abs(timeZNC) <= cfgZdcTimeCut) {
       neutronClass = 2;
       registry.fill(HIST("neutronClass"), 1, 0);
     }
+    if (std::abs(timeZNA) > cfgZdcTimeCut && std::abs(timeZNC) <= cfgZdcTimeCut) {
+      neutronClass = 1;
+      registry.fill(HIST("neutronClass"), 0, 1);
+    }
     if (std::abs(timeZNA) <= cfgZdcTimeCut && std::abs(timeZNC) <= cfgZdcTimeCut) {
       neutronClass = 3;
       registry.fill(HIST("neutronClass"), 1, 1);
@@ -332,10 +332,6 @@ struct FlowCorrelationsUpc {
       return false;
     }
 
-    if (!zdcTimeCut(collision)) {
-      return false;
-    }
-
     return true;
   }