[Vala] pulseaudio example

[august <august alien mur at>]

I thought this might be useful for others.  

PulseAudio comes with vapi bindings, but without any examples.  

Here is a simple example that uses their  callback api to generate and
play a sine wave.

http://pastebin.com/h92TT5hD

maybe one could put it in the gnome live examples page.


best -august.