Removed distinction between "available" and "init" in audio backends, since both had to be checked for success as a pair at the higher level and several of the Available methods were just always-succeed placeholders anyhow. Now the availability check is done in the init code, and the higher level tries all possible drivers until one manages to initialize successfully.

SDL on BeOS R5
==============

You can build SDL on BeOS like any other GNU style package.
e.g. ./configure && make && make install
By default it is installed in /boot/develop/tools/gnupro/{bin,lib,etc.}

Once you install SDL, you need to copy libSDL.so to /boot/home/config/lib,
so it can be found by the dynamic linker.

Enjoy!
	Sam Lantinga				(slouken@libsdl.org)