From 2b671dbd2e7b13e6d12d0da3ff1783ab4be175cc Mon Sep 17 00:00:00 2001
From: Joe Taylor <k1jt@arrl.org>
Date: Sat, 13 Jun 2015 12:08:32 +0000
Subject: [PATCH] Fix erroneous use of a potentially NULL pointer.

git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@5604 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
---
 mainwindow.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/mainwindow.cpp b/mainwindow.cpp
index 656230204..eef65bdf5 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -1542,7 +1542,9 @@ void MainWindow::freezeDecode(int n)                          //freezeDecode()
 void MainWindow::on_ClrAvgButton_clicked()
 {
   m_nclearave=1;
-  if(m_msgAvgWidget->isVisible()) m_msgAvgWidget->displayAvg("");
+  if(m_msgAvgWidget != NULL) {
+    if(m_msgAvgWidget->isVisible()) m_msgAvgWidget->displayAvg("");
+  }
 }
 
 void MainWindow::msgAvgDecode2()