From 3dc89feafcee31ef5169d827015f1fe2a18da08b Mon Sep 17 00:00:00 2001
From: KIU Shueng Chuan <nixchuan@gmail.com>
Date: Thu, 5 Dec 2013 07:04:21 +0800
Subject: [PATCH] use enum retired_fd instead of -1

using -1 causes a warning on Windows platform because SOCKET is unsigned.
---
 src/socket_base.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/socket_base.cpp b/src/socket_base.cpp
index 935c0099..a1b1ec0a 100644
--- a/src/socket_base.cpp
+++ b/src/socket_base.cpp
@@ -119,7 +119,7 @@ zmq::socket_base_t *zmq::socket_base_t::create (int type_, class ctx_t *parent_,
             errno = EINVAL;
             return NULL;
     }
-    if (s->mailbox.get_fd () == -1)
+    if (s->mailbox.get_fd () == retired_fd)
         return NULL;
 
     alloc_assert (s);