prefetch: do not defer pause
prefetch: do not defer pause

Do not wait for full buffers to pause the underlying stream. This
improves responsiveness (upon resumption) for live streams. This also
ensures that no I/O is done while the input thread is paused; some apps
might reasonably expect such behaviour.

xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc,xkfz007/vlc