Change internal modifier to private modifier for new haxe class.

![1](https://f.cloud.github.com/assets/1700940/1373755/713c6242-3a66-11e3-9331-672604343d4b.png)
![d5c01604lc](https://f.cloud.github.com/assets/1700940/1373756/7397dd82-3a66-11e3-91f2-e6e1b9ca019e.png)