Clear the screen to actual black based on the format of the screen.
Clear the screen to actual black based on the format of the screen.

Use a better texture format for YUV overlay software fallbacks

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%403257

aduros/SDL,aduros/SDL,cebash/SDL_PSL1GHT,cebash/SDL_PSL1GHT,cebash/SDL_PSL1GHT,cebash/SDL_PSL1GHT,aduros/SDL,aduros/SDL,cebash/SDL_PSL1GHT,aduros/SDL