修改：mapFunctionConfig给默认值

src/main/java/club/joylink/rtss/vo/map/MapGraphDataNewVO.java

@@ -230,6 +230,7 @@ public class MapGraphDataNewVO {
     public MapGraphDataNewVO() {
         this.bigScreenConfig = new BigScreenConfig();
         this.generateConfig = new MapCiGenerateConfig();
+        this.mapFunctionConfig = new MapFunctionConfig();
         this.sectionList = new ArrayList<>();
         this.switchList = new ArrayList<>();
         this.signalList = new ArrayList<>();