From 6fbbef1bb57e50f024d3c1486921b571ae9581b1 Mon Sep 17 00:00:00 2001
From: kruland2607 <kruland2607@users.noreply.github.com>
Date: Tue, 28 Oct 2014 20:34:47 -0500
Subject: [PATCH] Fixed NPE reported through a bug report.  Somehow the
 listenerList was null when a change event was fired.  Don't know how this
 really can happen, but protecting against the NPE isn't a bad idea.

---
 core/src/net/sf/openrocket/rocketcomponent/Configuration.java | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/core/src/net/sf/openrocket/rocketcomponent/Configuration.java b/core/src/net/sf/openrocket/rocketcomponent/Configuration.java
index 4cad9533a..e426df1d7 100644
--- a/core/src/net/sf/openrocket/rocketcomponent/Configuration.java
+++ b/core/src/net/sf/openrocket/rocketcomponent/Configuration.java
@@ -189,11 +189,10 @@ public class Configuration implements Cloneable, ChangeSource, ComponentChangeLi
 	 */
 	public void release() {
 		rocket.removeComponentChangeListener(this);
-		listenerList = null;
+		listenerList = new ArrayList<EventListener>();
 		rocket = null;
 	}
 	
-	
 	////////////////  Listeners  ////////////////
 	
 	@Override