demux_mkv: use normal index data structure even for incomplete files

Incomplete files don't have a valid index, because the index is usually
located near the end of a file. In this case, an index is created on the
fly during demuxing, or when seeks are done.

This used a completely different code path, which leads to unnecessary
complications and code duplication. Use the normal index data structure
instead. The seeking code at the end of seek_creating_index() (in this
commit renamed to create_index_until()) is removed. The normal seek code
does the same thing instead.

0 files changed, 0 insertions, 0 deletions