From 918f0e5b61d9d279e947486884314a0953d65901 Mon Sep 17 00:00:00 2001
From: Collin Kidder <collink@kkmfg.com>
Date: Mon, 25 May 2015 21:12:29 -0400
Subject: [PATCH] Fix null pointer deference that can happen if you exit the
 program without ever starting the serial port code.

---
 serialworker.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/serialworker.cpp b/serialworker.cpp
index de2ec11..bab78a2 100644
--- a/serialworker.cpp
+++ b/serialworker.cpp
@@ -30,7 +30,7 @@ SerialWorker::~SerialWorker()
         serial->disconnect(); //disconnect all signals
         delete serial;
     }
-    ticker->stop();
+    if (ticker != NULL) ticker->stop();
 }
 
 void SerialWorker::setSerialPort(QSerialPortInfo *port)