Fix in-game flickering in BOF3 (buffered rendering mode)

This one seems to be the logical one now .It didn't work well previously until UpdateSamplingParams() get corrected for render-to-texture by @unknownbrackets 

This simply fixes the following wrong framebuffer sizing and caused flickering.

1. BOF3 in-game flickering (buffered rendering mode). #2759 
2. Wildarm XF video flickering . #4325

Meanwile , the following testing items have been well-tested 


    TOPX title , town/worldmap and final credit .
    Wildarm XF in-game battle
    Midnight Club 3 in-game race battle
    Kingdom Heart in-game , cutscenes and character shadow
    FF crisis character shadow.
    MSG peace maker in-game and cutscene
    MotoStorm in-game
    Summon Night 5 character shadow
    Mortal Kombat chacter shadow
    MotoGP car selection