From 529045b65debcf45e87b9cb5bb1a8b47b4d26199 Mon Sep 17 00:00:00 2001
From: Victor Zverovich <victor.zverovich@gmail.com>
Date: Fri, 28 Dec 2012 09:41:03 -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 7ad0908b..94b3aca2 100644
--- a/format.cc
+++ b/format.cc
@@ -322,7 +322,7 @@ void Formatter::FormatDouble(T value, const FormatSpec &spec, int precision) {
     sign = (spec.flags & PLUS_FLAG) != 0 ? '+' : ' ';
   }
 
-  if (isnan(value)) {
+  if (value != value) {
     // Format NaN ourselves because sprintf's output is not consistent
     // across platforms.
     std::size_t size = 4;