From c88b68335444e26a0aec360ddcdb4a0181b06ef0 Mon Sep 17 00:00:00 2001
From: Lauri Kasanen <cand@gmx.com>
Date: Thu, 3 Nov 2022 14:24:17 +0200
Subject: [PATCH] Write rect count in udp lastrect's X

---
 common/rfb/SMsgWriter.cxx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/common/rfb/SMsgWriter.cxx b/common/rfb/SMsgWriter.cxx
index aba2cdd..32df339 100644
--- a/common/rfb/SMsgWriter.cxx
+++ b/common/rfb/SMsgWriter.cxx
@@ -365,7 +365,7 @@ void SMsgWriter::writeFramebufferUpdateEnd()
 
     // Send an UDP flip marker, if needed
     if (cp->supportsUdp) {
-      udps->writeS16(0);
+      udps->writeS16(nRectsInUpdate);
       udps->writeS16(0);
       udps->writeU16(0);
       udps->writeU16(0);