Added support for SDL 1.2 environment variables: 	SDL_VIDEO_FULLSCREEN_DISPLAY, SDL_VIDEO_FULLSCREEN_HEAD
Added support for SDL 1.2 environment variables:
	SDL_VIDEO_FULLSCREEN_DISPLAY, SDL_VIDEO_FULLSCREEN_HEAD


git-svn-id: 75429ccc2030f235ccf16e6b9b7f8e83d5edd22e@5346 c70aab31-4412-0410-b14c-859654838e24

albertz/sdl,albertz/sdl,albertz/sdl,albertz/sdl