From 978c16105dd334a4a2807140dbbcc7f306a6b581 Mon Sep 17 00:00:00 2001
From: Keith Packard <keithp@keithp.com>
Date: Wed, 24 Oct 2012 23:55:45 -0700
Subject: [PATCH] altosui: Allow AltosConfig to abort before serial line starts

Check to see if the serial line is active before trying to close it.

Signed-off-by: Keith Packard <keithp@keithp.com>
---
 altosui/AltosConfig.java | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/altosui/AltosConfig.java b/altosui/AltosConfig.java
index 44c6239a..4b0edec0 100644
--- a/altosui/AltosConfig.java
+++ b/altosui/AltosConfig.java
@@ -393,8 +393,10 @@ public class AltosConfig implements ActionListener {
 	}
 
 	void abort() {
-		serial_line.close();
-		serial_line = null;
+		if (serial_line != null) {
+			serial_line.close();
+			serial_line = null;
+		}
 		JOptionPane.showMessageDialog(owner,
 					      String.format("Connection to \"%s\" failed",
 							    device.toShortString()),
-- 
2.30.2