Windows fixes by Cédric Tabin

Based on
https://github.com/nih-at/libzip/pull/11

THANKS

diff --git a/THANKS b/THANKS
index e3f78c2..745ca4b 100644
--- a/THANKS
+++ b/THANKS
@@ -14,6 +14,7 @@
 Boaz Stolk <bstolk@aweta.nl>
 Bogdan <bogiebog@gmail.com>
 Brian 'geeknik' Carpenter <geeknik@protonmail.ch>
+Cédric Tabin
 Chris Nehren <cnehren+libzip@pobox.com>
 Coverity <info@coverity.com>
 Dane Springmeyer <dane.springmeyer@gmail.com>