fix：myeta切换分类问题

src/views/mychart_manage/index.vue

@@ -623,7 +623,7 @@ export default {
     /* 切换分类 */
     chooseClassify({MyChartClassifyId,fromPublic,AdminId}) {
       if(fromPublic!==1){
-        this.$refs.catalogTree.setCurrentKey(null)
+        this.$refs.catalogTree&&this.$refs.catalogTree.setCurrentKey(null)
       }
       this.select_classify = MyChartClassifyId;
       this.ispublic = fromPublic;