From ad46bb9b6e4a362d6017d0136856d7709acf780f Mon Sep 17 00:00:00 2001
From: Ray Clark <raynichc@users.noreply.github.com>
Date: Mon, 3 Oct 2022 11:20:47 +1100
Subject: [PATCH] Fixed NPE when scaling if no components are selected

---
 .../src/net/sf/openrocket/gui/main/DocumentSelectionModel.java | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/swing/src/net/sf/openrocket/gui/main/DocumentSelectionModel.java b/swing/src/net/sf/openrocket/gui/main/DocumentSelectionModel.java
index 5d9277df7..dff4a0097 100644
--- a/swing/src/net/sf/openrocket/gui/main/DocumentSelectionModel.java
+++ b/swing/src/net/sf/openrocket/gui/main/DocumentSelectionModel.java
@@ -2,6 +2,7 @@ package net.sf.openrocket.gui.main;
 
 import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.Collections;
 import java.util.LinkedList;
 import java.util.List;
 
@@ -90,7 +91,7 @@ public class DocumentSelectionModel {
 	 * @return	the currently selected rocket components, or <code>null</code>.
 	 */
 	public List<RocketComponent> getSelectedComponents() {
-		if (componentSelection.size() == 0) return null;
+		if (componentSelection.size() == 0) return Collections.EMPTY_LIST;
 		return componentSelection;
 	}