minimal_by_hdr_and_img_gz fails on Windows

[nilgoyette]

This is not a new problem, I just waited a long time to report it.

When I run cargo test --release --features ndarray_volumes, minimal_by_hdr_and_img_gz fails on Windows and WSL. Moreover, it stops the other tests from running. To see the tests from volume.rs and writer.rs, I must remove the minimal_by_hdr_and_img_gz test.

I didn't investigate yet but I'm probably the only one with Windows so I'll do that "soon". What we could do to confirm the problem is to tell travis to test all OS. They added Windows support in the last months.

os:
  - windows
  - linux
  - osx
language: rust
...

[Enet4]

Is this a different issue from #4? But yes, whatever the problem is here, we could add osx and windows to Travis.

[nilgoyette]

Hahaha, wow, I totally forgot about this issue. I'll confirm that it has the same cause and, if so, I'll fix the tests. We can't really ask other contributors or travis to use the hack you suggested.

[Enet4]

Closing as fixed by #29.