playsound crash (PhysicsFS-related)

[Torbjörn Andersson]

I noticed that if SDL_sound is compiled with PhysicsFS support, 
playsound will crash after playing a file, at least if it isn't part of 
an archive file.

This is because PHYSFS_deinit() is being called without a corresponding 
call to PHYSFS_init(). I think the actual crash happens because 
PhysicsFS's findErrorForCurrentThread() tries to grab the errorLock 
mutex, which hasn't been created at this stage.

I used yesterday's CVS snapshots of both SDL_sound and PhysicsFS.

Torbjörn