From d59648316c374125346c88cb8977d30bb9833857 Mon Sep 17 00:00:00 2001
From: Kevin Ruland <kruland@sunflower.com>
Date: Tue, 18 Sep 2012 01:39:24 +0000
Subject: [PATCH] Protect against null values in Prefix Key generation.

---
 core/src/net/sf/openrocket/preset/ComponentPreset.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/src/net/sf/openrocket/preset/ComponentPreset.java b/core/src/net/sf/openrocket/preset/ComponentPreset.java
index 6e7bd7aaf..0d1885b52 100644
--- a/core/src/net/sf/openrocket/preset/ComponentPreset.java
+++ b/core/src/net/sf/openrocket/preset/ComponentPreset.java
@@ -287,7 +287,7 @@ public class ComponentPreset implements Comparable<ComponentPreset> {
 	}
 	
 	public String preferenceKey() {
-		return get(MANUFACTURER).toString() + "|" + get(PARTNO);
+		return String.valueOf(get(MANUFACTURER)) + "|" + String.valueOf(get(PARTNO));
 	}
 	
 	@Override