Currently, the winegstreamer media source checks for EOS when
RequestSample() is called, but doesn't handle the cases when EOS
is detected between the RequestSample() call and the moment when
the request is popped from the command queue and serviced. This
can result in the media source waiting forever for a sample and
get stuck.

This commit fixes the bug by adding a check for EOS in
wait_for_event().

This commit fixes Medieval Dynasty hanging on developer logos on
the Steam Deck.
Signed-off-by: Giovanni Mascellani <gmascellani@codeweavers.com>
Signed-off-by: Zebediah Figura <zfigura@codeweavers.com>
Signed-off-by: Nikolay Sivov <nsivov@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>