content_length type was std::size_t and was changed to long long in (cpp-netlib#753)

commit f8ff77d. It is also initialized to
-1 in parse_headers_real(...).

Signed-off-by: Edward Kigwana <[email protected]>

Author: ekigwana

boost/network/protocol/http/client/connection/async_protocol_handler.hpp

@@ -348,9 +348,9 @@ struct http_async_protocol_handler {
     }
     return false;
   }
-  
+
   inline bool parse_content_length_complete() const {
-    return this->partial_parsed.length() >= this-> content_length;
+    return static_cast<std::ptrdiff_t>(this->partial_parsed.length()) >= this->content_length;
   }
 
   bool parse_chunk_encoding_complete() const {