Fix build on MinGW.

From Lubomir I. Ivanov <neolit123@gmail.com>.
diff --git a/THANKS b/THANKS
index c6a28c9..1029de0 100644
--- a/THANKS
+++ b/THANKS
@@ -22,6 +22,7 @@
 Joel Ebrahimi <joel.ebrahimi@gmail.com>
 Jono Spiro <jono.spiro@gmail.com>
 Kohei Yoshida <kohei.yoshida@gmail.com>
+Lubomir I. Ivanov <neolit123@gmail.com>
 Martin Szulecki <m.szulecki@libimobiledevice.org>
 Michal Vyskocil <mvyskocil@suse.cz>
 Mikhail Gusarov <dottedmag@dottedmag.net>.