them in:
<pre><code>
		SDL_AUDIO_FREQUENCY
		SDL_AUDIO_FORMAT
		SDL_AUDIO_CHANNELS
		SDL_AUDIO_SAMPLES
</code></pre>
	If an environment variable is not specified, it will be set
	to a reasonable default value.
<LI>
	SDL_SetVideoMode() now accepts 0 for width or height and will use
	the current video mode (or the desktop mode if no mode has been set.)
<LI>
	Added current_w and current_h to the SDL_VideoInfo structure,
	which is set to the desktop resolution during video intialization,
	and then set to the cu