diff -r 000000000000 -r 6474c204b198 security/nss/lib/zlib/patches/msvc-vsnprintf.patch
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/security/nss/lib/zlib/patches/msvc-vsnprintf.patch	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,22 @@
+--- zlib-1.2.5/zutil.h	2010-04-18 12:29:24 -0700
++++ zlib/zutil.h	2010-08-21 18:07:03 -0700
+@@ -172,17 +172,18 @@
+ #endif
+ 
+ #ifndef F_OPEN
+ #  define F_OPEN(name, mode) fopen((name), (mode))
+ #endif
+ 
+          /* functions */
+ 
+-#if defined(STDC99) || (defined(__TURBOC__) && __TURBOC__ >= 0x550)
++#if defined(STDC99) || (defined(__TURBOC__) && __TURBOC__ >= 0x550) || \
++   (defined(_MSC_VER) && _MSC_VER >= 1500)
+ #  ifndef HAVE_VSNPRINTF
+ #    define HAVE_VSNPRINTF
+ #  endif
+ #endif
+ #if defined(__CYGWIN__)
+ #  ifndef HAVE_VSNPRINTF
+ #    define HAVE_VSNPRINTF
+ #  endif