Consistently use the stateblock's contained states to determine what to
capture.

Use IWineD3DStateBlockImpl_Capture() for the initial stateblock capture
instead.

snd_pcm_drain can cause a deadlock if in the wrong state, and 
snd_pcm_drop below does the same thing.

winex11: Introduce get_xrender_picture for retrieving a Picture from a physDev and allocating a Picture when needed.