[Bug Report] PopupRadio组件引入就报错

### VUX version
2.9.0

### OS/Browsers version
win10 / chrome 65.0.3325.181

### Vue version
2.5.2

### Code

```html
import {PopupRadio} from 'vux'

```

### Steps to reproduce
引入PopupRadio组件,编译报错,去掉引入恢复正常

### What is Expected?
正常使用

### What is actually happening?
Failed to compile.

./node_modules/_babel-loader@7.1.4@babel-loader/lib!./node_modules/_vux-loader@1.2.8@vux-loader/src/script-loader.js!./node_modules/_vux-loader@1.2.8@vux-loader/src/script-loader.js!./node_modules/_vue-loader@13.7.1@vue-loader/lib/selector.js?type=script&index=0!./node_modules/_vux@2.9.0@vux/src/components/popup-radio/index.vue
Module build failed: TypeError: F:/workspace/ent_admin_h5/node_modules/_vux@2.9.0@vux/src/components/popup-radio/index.vue: Cannot read property 'value' of undefined
at getName (F:\workspace\ent_admin_h5\node_modules\_babel-plugin-transform-es2015-duplicate-keys@6.24.1@babel-plugin-transform-es2015-duplicate-keys\lib\index.js:85:14)
at PluginPass.ObjectExpression (F:\workspace\ent_admin_h5\node_modules\_babel-plugin-transform-es2015-duplicate-keys@6.24.1@babel-plugin-transform-es2015-duplicate-keys\lib\index.js:41:22)
at newFn (F:\workspace\ent_admin_h5\node_modules\_babel-traverse@6.26.0@babel-traverse\lib\visitors.js:276:21)
at NodePath._call (F:\workspace\ent_admin_h5\node_modules\_babel-traverse@6.26.0@babel-traverse\lib\path\context.js:76:18)
at NodePath.call (F:\workspace\ent_admin_h5\node_modules\_babel-traverse@6.26.0@babel-traverse\lib\path\context.js:48:17)
at NodePath.visit (F:\workspace\ent_admin_h5\node_modules\_babel-traverse@6.26.0@babel-traverse\lib\path\context.js:105:12)
at TraversalContext.visitQueue (F:\workspace\ent_admin_h5\node_modules\_babel-traverse@6.26.0@babel-traverse\lib\context.js:150:16)
at TraversalContext.visitSingle (F:\workspace\ent_admin_h5\node_modules\_babel-traverse@6.26.0@babel-traverse\lib\context.js:108:19)
at TraversalContext.visit (F:\workspace\ent_admin_h5\node_modules\_babel-traverse@6.26.0@babel-traverse\lib\context.js:192:19)
at Function.traverse.node (F:\workspace\ent_admin_h5\node_modules\_babel-traverse@6.26.0@babel-traverse\lib\index.js:114:17)
at NodePath.visit (F:\workspace\ent_admin_h5\node_modules\_babel-traverse@6.26.0@babel-traverse\lib\path\context.js:115:19)
at TraversalContext.visitQueue (F:\workspace\ent_admin_h5\node_modules\_babel-traverse@6.26.0@babel-traverse\lib\context.js:150:16)
at TraversalContext.visitMultiple (F:\workspace\ent_admin_h5\node_modules\_babel-traverse@6.26.0@babel-traverse\lib\context.js:103:17)
at TraversalContext.visit (F:\workspace\ent_admin_h5\node_modules\_babel-traverse@6.26.0@babel-traverse\lib\context.js:190:19)
at Function.traverse.node (F:\workspace\ent_admin_h5\node_modules\_babel-traverse@6.26.0@babel-traverse\lib\index.js:114:17)
at NodePath.visit (F:\workspace\ent_admin_h5\node_modules\_babel-traverse@6.26.0@babel-traverse\lib\path\context.js:115:19)
@ ./node_modules/_vux@2.9.0@vux/src/components/popup-radio/index.vue 8:0-241
@ ./node_modules/_babel-loader@7.1.4@babel-loader/lib!./node_modules/_vux-loader@1.2.8@vux-loader/src/script-loader.js!./node_modules/_vux-loader@1.2.8@vux-loader/src/script-loader.js!./node_modules/_vue-loader@13.7.1@vue-loader/lib/selector.js?type=script&index=0!./src/views/baseInfo/BaseInfo.vue
@ ./src/views/baseInfo/BaseInfo.vue
@ ./src/router/index.js
@ ./src/main.js
@ multi ./node_modules/_webpack-dev-server@2.11.2@webpack-dev-server/client?http://0.0.0.0:8080 webpack/hot/dev-server ./src/main.js