wim->out_pack_compression_type = wim_default_pack_compression_type();
wim->out_pack_chunk_size = wim_default_pack_chunk_size(
wim->out_pack_compression_type);
wim->out_pack_compression_type = wim_default_pack_compression_type();
wim->out_pack_chunk_size = wim_default_pack_chunk_size(
wim->out_pack_compression_type);