* will be for Open Flow version 'ofp_version'. Returns message
* as a struct ofpbuf. Returns encoded message on success, NULL on error */
struct ofpbuf *
-ofputil_encode_dump_ports_request(enum ofp_version ofp_version, int16_t port)
+ofputil_encode_dump_ports_request(enum ofp_version ofp_version, uint16_t port)
{
struct ofpbuf *request;