- Add a few sanity checks

- Add a few sanity checks
- Check for invalid guids passed to IDirectSoundCapture::Initialize
- Add support for creating IDirectSoundCapture object via CoCreateInstance
- Close pin handle when the capture buffer is released
- Implement IDirectSoundCaptureBuffer::GetCaps, IDirectSoundCaptureBuffer::GetCurrentPosition, IDirectSoundCaptureBuffer::GetFormat, IDirectSoundCaptureBuffer::GetStatus, IDirectSoundCaptureBuffer::Start
- Compute a compatible pin format when the format is not supported natively by the driver
- Fix shadowing of global variable (Usurp)
- Verify that directsound global info has already initialized in IDirectSound8::Initialize
- dsound now fails 49/650 on dsound_winetest test:capture (mixing needs to implemented) The remaining tests fail due to unimplemented functionality in portcls / ks / dsound

svn path=/trunk/; revision=43930