decoder: handle flush "before" pause/resume
decoder: handle flush "before" pause/resume

This restores the ability to flush the decoder while it is paused.

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