From 3c8cfe9b76d6010c1a2f967b3e800b3169e15716 Mon Sep 17 00:00:00 2001
From: James Turner <zakalawe@mac.com>
Date: Mon, 18 Feb 2013 13:56:41 +0000
Subject: [PATCH] Fix MSVC compilation, thanks to Fred.

---
 simgear/sound/sample_group.cxx | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/simgear/sound/sample_group.cxx b/simgear/sound/sample_group.cxx
index c91ca543..78efd167 100644
--- a/simgear/sound/sample_group.cxx
+++ b/simgear/sound/sample_group.cxx
@@ -34,7 +34,10 @@
 #include "sample_group.hxx"
 
 using std::string;
+
+#ifdef HAVE_STD_ISNAN
 using std::isnan;
+#endif
 
 bool isNaN(float *v) {
    return (isnan(v[0]) || isnan(v[1]) || isnan(v[2]));
-- 
2.39.5