parsebin: push missed flush-start/stop events to multiqueue pre
Dear All
During upstream changes and auto plugging is in progress, flush-start and flush-stop events could be returned as 'not linked' when flush seek event.
Both of flush events are not delivered to multiqueue pre. Either flush-start or flush-stop could not be delivered. Because of this unexpected symptom, parsebin is pending and waiting to switch chains even if EOS is detected or it has to start switch.
To avoid this, force to push flush-start/stop events again to multiqueue pre.
Thanks.