Small fix to framebuffer sizing

This try to fix the previously video flickering in Wildarm XF  Issue #4325  (It is tested without using savestate)

Meanwhile , i try to focus to test all those items that we may break .

1. TOPX title , town/worldmap and final credit .
2. Wildarm XF in-game battle
3. Midnight Club 3 in-game race battle
4. Kingdom Heart in-game , cutscenes and character shadow
5. FF crisis character shadow.
6. MSG peace maker in-game and cutscene
7. MotoStorm in-game
8. Summon Night 5 character shadow

Hoepfully no regression this time .