From 6d4e2ce93b1cd12040d2a030869d95225a3093bf Mon Sep 17 00:00:00 2001
From: Victor Perron <victor@iso3103.net>
Date: Fri, 30 Nov 2012 22:58:03 +0100
Subject: [PATCH] Change NULL to 0 to keep compatibility with some
 cross-compiling GCC versions

---
 src/decoder.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/decoder.hpp b/src/decoder.hpp
index 814c3197..4ed2eb31 100644
--- a/src/decoder.hpp
+++ b/src/decoder.hpp
@@ -149,7 +149,7 @@ namespace zmq
         bool stalled ()
         {
             //  Check whether there was decoding error.
-            if (unlikely (static_cast <T*> (this)->next == NULL))
+            if (unlikely (!(static_cast <T*> (this)->next)))
                 return false;
 
             while (!to_read) {