Patch 1 : problem in `getSelector()`

problem in `getSelector()`

https://github.com/clevertech/YiiBooster/commit/9c6e04ad2a527f3f6192c6acc998d75436a4fd23#commitcomment-2622787

https://github.com/clevertech/YiiBooster/issues/287#issuecomment-13548286