Replace the SDL_DisplayFormat fallback path.
Replace the SDL_DisplayFormat fallback path.

The SDL_DisplayFormat path in blit does the wrong thing in certain
cases, so we drop it.

See https://bitbucket.org/pygame/pygame/commits/b0117d331d33 for
the gory details.

CTPUG/pygame_cffi,CTPUG/pygame_cffi,CTPUG/pygame_cffi