From 7b970285da09b98864da48f8562c36daf041ea5d Mon Sep 17 00:00:00 2001
From: Victor Zverovich <victor.zverovich@gmail.com>
Date: Fri, 28 Dec 2012 09:24:06 -0800
Subject: [PATCH] Fix the build.

---
 format.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/format.cc b/format.cc
index 6779973f..7ad0908b 100644
--- a/format.cc
+++ b/format.cc
@@ -139,7 +139,7 @@ void FormatDecimal(char *buffer, uint64_t value, unsigned num_digits) {
 #ifdef _MSC_VER
 int signbit(double value) {
   if (value < 0) return 1;
-  if (!isnan(value)) return 0;
+  if (value == value) return 0;
   int dec = 0, sign = 0;
   ecvt(value, 0, &dec, &sign);
   return sign;