Empty distance code table may cause problems on Windows 10 about libflate

[oyvindln]

It seems to be allowed for deflate/zlib, but not for zip:
https://github.com/zlib-ng/zlib-ng/blob/a9f5d668f692f894e89256ec3696c55c131510ed/trees.c#L565

It's a bit of an edge case. In zlib, miniz, miniz_oxide and deflate-rs there being zero distance codes would result in a outputting a stored or static block, unless the compressor is explicitly set to only do huffman and no length matching, as one of those would take up less space. Zlib seems to have some code for this edge-case though.

[sile]

@mvdnes @oyvindln Thank you for reporting this problem and giving me helpful information for solving it.

I created a PR (#24) for fixing this problem.
This branch seems to work well in my environment (Windows 10). But I would very appreciate it if you could test this branch. > @mvdnes

[mvdnes]

Thank you for this fix!
My tests indicate that the zips now work on Windows, so I would be very happy if this could be included.

[sile]

@mvdnes Thank you very much! I merged the PR and published v0.1.21 to crates.io.

[mvdnes]

Thank you for the quick response!