Fixes warning when compiling with MSVC on Win64

Signed-off-by: Martin Sustrik <sustrik@250bpm.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/encoder.hpp b/src/encoder.hpp
index 617b65b..90b5ffe 100644
--- a/src/encoder.hpp
+++ b/src/encoder.hpp
@@ -86,7 +86,7 @@ namespace zmq
                     //  first-message-offset.
                     if (beginning) { 
                         if (offset_ && *offset_ == -1)
-                            *offset_ = pos;
+                            *offset_ = (int) pos;
                         beginning = false;
                     }
                 }