Render correct fog in 3rd birthday and menu transparency in Kurohyou 2

I compared it with real PSP and should be 100% matching now .

![screen00136](https://f.cloud.github.com/assets/3000282/1725031/2c6ecbe6-627a-11e3-9ce0-6cf98dafaeac.jpg)
![screen00137](https://f.cloud.github.com/assets/3000282/1725032/2f9ed400-627a-11e3-8be9-3ebbd4c534c1.jpg)
![screen00138](https://f.cloud.github.com/assets/3000282/1725034/32b94c06-627a-11e3-8c1d-a451e2a3e847.jpg)