From 706659a97f9d46a8ca617ad9a7bf03b1009e2a62 Mon Sep 17 00:00:00 2001
From: Daniela Engert <dani@ngrt.de>
Date: Sat, 16 Dec 2017 10:40:49 +0100
Subject: [PATCH] std::basic_string::size() may return a size_type which is
 wider than an int.

Signed-off-by: Daniela Engert <dani@ngrt.de>
---
 include/boost/system/detail/error_code.ipp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/boost/system/detail/error_code.ipp b/include/boost/system/detail/error_code.ipp
index a2b3f11..b712de7 100644
--- a/include/boost/system/detail/error_code.ipp
+++ b/include/boost/system/detail/error_code.ipp
@@ -410,7 +410,7 @@ namespace
         }
     }
     
-    int num_chars = (buf.size() + 1) * 2;
+    int num_chars = static_cast<int>(buf.size() + 1) * 2;
 
     boost::winapi::LPSTR_ narrow_buffer =
 #if defined(__GNUC__)