use htonl(ppid) when sending a SCTP message
diff --git a/src/hnbgw.c b/src/hnbgw.c
index 2db0afb..0839e69 100644
--- a/src/hnbgw.c
+++ b/src/hnbgw.c
@@ -85,7 +85,7 @@
 {
 	struct hnb_context *ctx = fd->data;
 	struct sctp_sndrcvinfo sinfo = {
-		.sinfo_ppid = msgb_ppid(msg),
+		.sinfo_ppid = htonl(msgb_ppid(msg)),
 		.sinfo_stream = ctx->hnbap_stream,
 	};
 	int rc;