管道信息新增，前端报错问题处理。

zh-baseversion-web/src/views/regulation/pipe/index.vue

@@ -516,7 +516,8 @@ export default {
       selectTEnterprise().then(response => {
         this.test = response.data;
       }); 
-      this.coordinateslist+=JSON.parse(null);
+      // this.coordinateslist+=JSON.parse(null); 
+      this.coordinateslist = null; 
       this.reset();
       this.open = true;
       this.title = "添加管道信息";