patch of zlib for cygwin (thanks to A. Kakuto)

source/libs/zlib/zlib-PATCHES/ChangeLog

+2017-01-13  Akira Kakuto  <kakuto@fuk.kindai.ac.jp>
+
+	Add patch-01-not-define-WIDECHAR-for-cygwin, in order to not define
+	WIDECHAR for __CYGWIN__. Report from Luigi, David.
+
 2017-01-03  Akira Kakuto  <kakuto@fuk.kindai.ac.jp>
 
 	Import zlib-1.2.10.

source/libs/zlib/zlib-PATCHES/patch-01-not-define-WIDECHAR-for-cygwin

+diff -ur zlib-1.2.10.orig/gzguts.h zlib-1.2.10/gzguts.h
+--- zlib-1.2.10.orig/gzguts.h	Sun Jan 01 16:37:10 2017
++++ zlib-1.2.10/gzguts.h	Sat Jan 14 07:48:15 2017
+@@ -39,7 +39,7 @@
+ #  include <io.h>
+ #endif
+ 
+-#if defined(_WIN32) || defined(__CYGWIN__)
++#if defined(_WIN32)
+ #  define WIDECHAR
+ #endif
+ 

source/libs/zlib/zlib-src/gzguts.h

@@ -39,7 +39,7 @@
 #  include <io.h>
 #endif
 
-#if defined(_WIN32) || defined(__CYGWIN__)
+#if defined(_WIN32)
 #  define WIDECHAR
 #endif