From d9f92d506d1ba039e80feaa7f0f7d28ac52caef3 Mon Sep 17 00:00:00 2001
From: Aleksandar Fabijanic <alex@pocoproject.org>
Date: Tue, 11 Mar 2014 20:31:06 -0500
Subject: [PATCH] Update MessageHeader.h

---
 MongoDB/include/Poco/MongoDB/MessageHeader.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/MongoDB/include/Poco/MongoDB/MessageHeader.h b/MongoDB/include/Poco/MongoDB/MessageHeader.h
index b2bce5a2e..1cb3a9a2e 100644
--- a/MongoDB/include/Poco/MongoDB/MessageHeader.h
+++ b/MongoDB/include/Poco/MongoDB/MessageHeader.h
@@ -121,6 +121,7 @@ inline Int32 MessageHeader::getMessageLength() const
 
 inline void MessageHeader::setMessageLength(Int32 length)
 {
+	poco_assert (_messageLength >= 0);
 	_messageLength = MSG_HEADER_SIZE + length;
 }