plugins/ogg: Fix leaking comment on error path
plugins/ogg: Fix leaking comment on error path

We need to call vorbis_comment_clear() on error path.

profusion/lightmediascanner,Pelagicore/Media-Manager-lightmediascanner-patched,Pelagicore/Media-Manager-lightmediascanner-patched,profusion/lightmediascanner,Pelagicore/Media-Manager-lightmediascanner-patched,profusion/lightmediascanner