From a2128e50f956fa8e51c2f67074c18dff24885f3f Mon Sep 17 00:00:00 2001
From: Joe Taylor <joe@princeton.edu>
Date: Thu, 12 Jul 2018 08:58:04 -0400
Subject: [PATCH] Fix a blunder in sending old-style messages: if isync=1, then
 necessarily i3=0.

---
 mainwindow.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/mainwindow.cpp b/mainwindow.cpp
index 4f7506da7..de7eb4601 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -3493,7 +3493,8 @@ void MainWindow::guiUpdate()
               m_isync=1;
               if(!m_config.bGenerate77() and itype == 6 and (m_i3>0 or m_n3>0)) m_isync=2;
               if(m_config.bGenerate77()) m_isync=2;
-              char ft8msgbits[77]; 
+              if(m_isync==1) m_i3=0;
+              char ft8msgbits[77];
               genft8_(message, &m_i3, &m_n3, &m_isync, msgsent,
                       const_cast<char *> (ft8msgbits), const_cast<int *> (itone), 37, 37);
               if(m_config.bFox()) {