修正了release版因state.store为undefined而闪退的问题

[xiangdong9013]

由于首次启动时，state.store为undefined，所以更无法获取到state.store.version，所以造成生成的apk release版无法启动，直接闪退。

[jaggerwang]

不会存在state.store为undefined的情况。首次启动state为undefined，会设一个默认值{store: {version: undefined}}。只要state不为undefined，那么其下的store属性要么是reducer里的默认值，要么是更新后的值，但不会是undefined。

src/setup.js

...
    let {store: {version}} = state || {store: {version: undefined}}
    if (version === undefined || compareVersions(version, VERSION) < 0) {
      store.dispatch(actions.reset())
      store.dispatch(actions.setStoreVersion(VERSION))
    }
    store.dispatch(actions.resetScreenLastRefreshTime())
    logger.info('check store version ok')
...

src/reducers/store.js

...
const initialState = {
  version: undefined
}
...