From be8d772524a82cd61bcd2fca2307de6a77f0f65e Mon Sep 17 00:00:00 2001
From: john30 <ebusd@ebusd.eu>
Date: Sat, 22 Dec 2018 19:16:04 +0100
Subject: [PATCH] avoid using C++11 isnan

---
 src/lib/ebus/datatype.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/lib/ebus/datatype.cpp b/src/lib/ebus/datatype.cpp
index 59b5cab2..3a3695bb 100755
--- a/src/lib/ebus/datatype.cpp
+++ b/src/lib/ebus/datatype.cpp
@@ -696,7 +696,7 @@ result_t NumberDataType::readSymbols(size_t offset, size_t length, const SymbolS
         }
       }
 #endif
-      if (isnan(val)) {
+      if (val!=val) { // !isnan(val)
         if (outputFormat & OF_JSON) {
           *output << "null";
         } else {