FLAC: is_last not cleared when PADDING block inserted after #607
Description
Reproducer
https://gist.github.com/PandorasFox/8f8f82b25fe0ea3737237a10c0500165
Summary
(apologies for the codegenned reproduction case - I did all the validation with ffprobe/xxd by hand and then codebotted out the repro case out of my codebase)
tl;dr I did a mass-transcode of some wavs into flac via flacenc-rs + lofty for carrying over the tags after the fact - when lofty adds a padding block after the VORBIS_COMMENT block, it doesn't clear is_last on the VORBIS_COMMENT block, which leads to inconsistent decoder errors during playback.
vlc, for example, will play back fine since it will ignore the is_last and just seeks for the start of the stream itself - but the same files served over my navidrome will inconsistently play back depending on how strict my client is with the FLACs.
thankfully just a one-byte fix to repair the emitted files :)
Expected behavior
No response
Assets
No response