Similar to how a frame is considered for referencing for the RefPicList array.
This will do the same for RefPicSetStCurrBefore, RefPicSetStCurrAfter and
RefPicSetLtCurr.

Fixes playback of http://www.gbbsoft.pl/!download/!/Film1.mp4
Ref. VLC issue https://code.videolan.org/videolan/vlc/-/issues/26738Signed-off-by: Steve Lhomme <robux4@ycbcr.xyz>