[SDL] on SDL audio and aRTsd (and linux)

[Teunis Peters]

I know this -may- be treading on sacred ground, but is there any way for
SDL to probe the -software- drivers first before trying hardware?  I've
got multiple (3 actually) soundcards but only the first is hooked up to
speakers...  and under KDE/X, artsd is almost -always- active.  Now I
know I could disable artsd before running an SDL app, but that strikes me
as a waste of time due to theoretically SDL supporting it...

I know driver conf/driver load order is a "2.0" issue but still, checking
software drivers under -unix- first does seem useful...
(and falling back to the perfectly valid OSS/Alsa drivers afterward of
course... :)

G'day, eh? :)
	- Teunis (yes, I've quit using winterlion at fsj.net.  Long story...)

PS: environment variable fixes for this seem rather... shallow... as I
suspect this problem will show up on any system running KDE with 2 or more
soundcards :)