修复退出按钮不可用

pages/index/userCenter/index.js

@@ -1,4 +1,6 @@
 const _Http = getApp().globalData.http;
+let downCount = null;
+
 Component({
 	properties: {
 

pages/index/userCenter/index.json

@@ -1,4 +1,5 @@
 {
   "component": true,
-  "usingComponents": {}
+  "usingComponents": {
+  }
 }