[Openal] Is AL_NONE (or 0) a valid buffer name?

[Garin Hiebert]

This is _way_ too dangerous to change at this time -- there is a  
strong possibility that someone's code depends on this behavior,  
which has been incorporated for quite a while.  IMHO -- this should  
become a wishlist item and be subject to debate later on, but not for  
1.1.

Garin