The following behaviors from Windows are implemented:
 * Transitions from STOPPED to PAUSED are forbidden;
 * Sample requests are only emitted for transitions from STOPPED to
   RUNNING (i.e., not when transitioning from PAUSED);
 * Transition events are emitted again when transitioning from a
   state to the same state, except when such state is PAUSED.
Signed-off-by: Giovanni Mascellani <gmascellani@codeweavers.com>
Signed-off-by: Nikolay Sivov <nsivov@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>