hls: fix dvr change event after sliding window fix
hls: fix dvr change event after sliding window fix

clappr/clappr,clappr/clappr,dayvson/clappr,flavioribeiro/clappr,dayvson/clappr,dayvson/clappr,clappr/clappr,flavioribeiro/clappr,flavioribeiro/clappr