codecs: h264decoder: Try reference picture marking process in any case
codecs: h264decoder: Try reference picture marking process in any case
... even if there is some invalid conditions
(because of broken stream, our implementation fault or so).
Otherwise baseclass will keep such reference pictures and
it would result to DPB full.
codecs: h264decoder: Fix missing drain handling in bumping
Should've included in the commit 5527cc4a2e7ce8eeee1d8a717f99252477d6015f