Remove IIFE for deadband setting

Author: gazpachoking

plugins/inputs/opcua_listener/subscribe_client.go

@@ -70,17 +70,17 @@ func assignConfigValuesToRequest(req *ua.MonitoredItemCreateRequest, monParams *
 		if err := checkDataChangeFilterParameters(monParams.DataChangeFilter); err != nil {
 			return fmt.Errorf(err.Error()+", node '%s'", req.ItemToMonitor.NodeID)
 		}
+		var deadbandValue float64
+
+		if monParams.DataChangeFilter.DeadbandValue != nil {
+			deadbandValue = *monParams.DataChangeFilter.DeadbandValue
+		}
 
 		req.RequestedParameters.Filter = ua.NewExtensionObject(
 			&ua.DataChangeFilter{
 				Trigger:      ua.DataChangeTriggerFromString(string(monParams.DataChangeFilter.Trigger)),
 				DeadbandType: uint32(ua.DeadbandTypeFromString(string(monParams.DataChangeFilter.DeadbandType))),
-				DeadbandValue: func() float64 {
-					if monParams.DataChangeFilter.DeadbandValue != nil {
-						return *monParams.DataChangeFilter.DeadbandValue
-					}
-					return 0
-				}(),
+				DeadbandValue: deadbandValue,
 			},
 		)
 	}