Set FBO size to 512x512 when framebuffer changed

Hopefully it fixes most of the texture sizing issues .Tested against all the following games and renders correctly so far. 

1. Danganronpa ( with FramebuffersToMem = True) #2694
![screen00000](https://f.cloud.github.com/assets/3000282/768063/2b542bc0-e895-11e2-8c0d-14468614a215.png)

2. FF Crisis Core #2693
![screen00001](https://f.cloud.github.com/assets/3000282/768065/36a73e7c-e895-11e2-82e1-7a8c2b339ba5.png)

3. Final Fantasy Type
4. Castlevania The Dracula X Chronicles
5. Gundam AGE Universe
6. God of War Chains of Olympus
7. Saint Seiya Omega
8. MotoGP
9. Yu-Gi-Oh! 5D's Tag Force 6
10.Last_Ranker