修改bug

gic-platform-enterprise-web/src/main/java/com/gic/enterprise/web/controller/BillingRecordController.java

@@ -62,7 +62,7 @@ public class BillingRecordController {
                     if (applicationDTO != null) {
                         return applicationDTO.getApplicationId();
                     } else {
-                        return null;
+                        return 0L;
                     }
                 }
             });