[WDMAUD]

[WDMAUD]
- Use KsProbeStreamIrp in wdmaud to probe user buffers
- Remove a few hacks which were required to pass down irps to portcls
[PORTCLS]
- Check if there is an automation table
[SYSAUDIO]
- Release file object of pin to prevent reference leak
--
- Audio stack now reacts faster as it now longer copies audio buffers in kernel mode and instead locks down the user buffers. In addition it uses less memory to do the same work.

svn path=/trunk/; revision=43321