sdl/sdl: Update init constants to use definitions from original header file
sdl/sdl: Update init constants to use definitions from original header file

Signed-off-by: Lilis Iskandar <f9acb790f2c75b127492316321ece0121b8eed9b@veand.co>

veandco/go-sdl2,veandco/go-sdl2