floating point error in gcf tool?

[Meijuh]

~/ut/ltsmin-2.0/src/gcf-tool(master) $ ./gcf --list ../xyz.gcf Archive ../xyz.gcf contains: stream size compressed stream name (compression) 4 12 init (gzip) 316 45 SL-0-0 (rle32|gzip) 316 50 SL-0-1 (rle32|gzip) 316 55 SL-0-2 (rle32|gzip) 316 46 SL-0-3 (rle32|gzip) 316 31 SL-0-4 (rle32|gzip) 316 30 SL-0-5 (rle32|gzip) 316 48 SL-0-6 (rle32|gzip) 316 58 SL-0-7 (rle32|gzip) 316 58 SL-0-8 (rle32|gzip) 316 25 SL-0-9 (rle32|gzip) 316 25 SL-0-10 (rle32|gzip) 316 60 SL-0-11 (rle32|gzip) 316 56 SL-0-12 (rle32|gzip) 316 53 SL-0-13 (rle32|gzip) 316 28 SL-0-14 (rle32|gzip) 316 29 SL-0-15 (rle32|gzip) 316 55 SL-0-16 (rle32|gzip) 316 60 SL-0-17 (rle32|gzip) 316 50 SL-0-18 (rle32|gzip) 316 28 SL-0-19 (rle32|gzip) 316 25 SL-0-20 (rle32|gzip) 316 59 SL-0-21 (rle32|gzip) 316 60 SL-0-22 (rle32|gzip) 316 46 SL-0-23 (rle32|gzip) 316 25 SL-0-24 (rle32|gzip) 316 28 SL-0-25 (rle32|gzip) 316 49 SL-0-26 (rle32|gzip) 316 58 SL-0-27 (rle32|gzip) 316 31 SL-0-28 (rle32|gzip) 316 31 SL-0-29 (rle32|gzip) 432 48 ES-0-ofs (diff32|gzip) 432 126 ED-0-ofs (diff32|gzip) 11 19 CT-0 (gzip) 522 info totals: 10881 2029 files: 35 (81.35%) gcf file size 1048576 (51579.45% overhead, -9536.76% compression)