[Openal] Search path for wrap_oal.dll

[Garin Hiebert]

> Is there any way to add a path (namely ext\bin) to the search path?
No, there isn't a way to add a path to the search path right now.  I 
received a request and patch earlier this week asking to add a new rule 
whereby the directory where openal32.dll is will also be searched, and 
I'm planning on adding that to the router code for an upcoming 
distribution (and documenting the change of course).  In the meantime, 
the only way I can think to make this happen is to change the current 
working directory to the location where the wrapper is, do your 
enumeration, and then change the current working directory back to where 
it was (if that matters).

Garin