ole32: AddRef does not return an HRESULT. Have the constructor create the object with one reference.

This is the "Cryptography API: Next Generation" introduced by Vista.

We may want to push this into either wined3d or our future shader compiler
dll. It's not a whole lot of code though.

We do so by querying the EsounD latency and estimating dwPlayedTotal based on the elapsed time since the last write.
This benefits the accuracy of the completion notifications and of wodGetPosition().

We don't know how much free space we have in the EsounD buffer, so
just write until it is full. Sleep for a fraction of the time it will
take for the buffer to drain so we can refill it in time.