Function fermium::SDL_LowerBlitScaled

pub unsafe extern "C" fn SDL_LowerBlitScaled(
    src: *mut SDL_Surface, 
    srcrect: *mut SDL_Rect, 
    dst: *mut SDL_Surface, 
    dstrect: *mut SDL_Rect
) -> c_int

This is a semi-private blit function and it performs low-level surface scaled blitting only.