#81 zip: Two bugfixes and a dep8 test

[Santiago Vila]

Hello. This is Debian Bug #1093629 and this is the full URL for the bug:

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1093629

Follows a summary of the bug.

Note: I'm including the provided attachment "as is". You can ignore the parts related to Debian packaging,
but maybe the tests are interesting by themselves.

Florent 'Skia' Jacquet writes:

With the activation of _FORTIFY_SOURCE=3 in Ubuntu last year, zip has seen a few problems come into light. Please find attached a debdiff fixing them, along with the addition of a small dep8 test making sure they don't regress.