sctp_m2ua: Fix the byte order of the request flag for the StateConf

The ASP has not been looking at this value at all, fix the byte
order. On the other hand my ASP doesn't care about this either.
diff --git a/src/sctp_m2ua.c b/src/sctp_m2ua.c
index fb797b7..dfe9271 100644
--- a/src/sctp_m2ua.c
+++ b/src/sctp_m2ua.c
@@ -326,6 +326,7 @@
 			return -1;
 
 		index = htonl(link->link_index);
+		req = htonl(req);
 		conf->hdr.msg_class = M2UA_CLS_MAUP;
 		conf->hdr.msg_type = M2UA_MAUP_STATE_CON;
 		m2ua_msg_add_data(conf, MUA_TAG_IDENT_INT, 4, (uint8_t *) &index);