From 5f0ccc3e508f070dd4155fb942db56ac310f85fe Mon Sep 17 00:00:00 2001
From: Don Bright <hugh.m.bright@gmail.com>
Date: Tue, 14 Jan 2014 17:50:59 -0600
Subject: fix broken build on mingw / mxe


diff --git a/src/primitives.cc b/src/primitives.cc
index c7ebb82..97c1fef 100644
--- a/src/primitives.cc
+++ b/src/primitives.cc
@@ -40,6 +40,7 @@
 #include <assert.h>
 #include <boost/assign/std/vector.hpp>
 using namespace boost::assign; // bring 'operator+=()' into scope
+using boost::math::isinf;
 
 #define F_MINIMUM 0.01
 
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