From 11b7f4ac4444220d7075f9a07e387477f31d0bc7 Mon Sep 17 00:00:00 2001
From: Jeff Campbell <jeff@zapdot.com>
Date: Sat, 7 Mar 2020 21:30:46 +0100
Subject: [PATCH] Added NRE check for ValidateGraphEditor

* Added NRE check to prevent exception when NodeGraphEditor.GetEditor returns null and an existing non-null graph editor is already present.
---
 Scripts/Editor/NodeEditorWindow.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Scripts/Editor/NodeEditorWindow.cs b/Scripts/Editor/NodeEditorWindow.cs
index 1f64653..4fc1136 100644
--- a/Scripts/Editor/NodeEditorWindow.cs
+++ b/Scripts/Editor/NodeEditorWindow.cs
@@ -97,7 +97,7 @@ namespace XNodeEditor {
         /// <summary> Make sure the graph editor is assigned and to the right object </summary>
         private void ValidateGraphEditor() {
             NodeGraphEditor graphEditor = NodeGraphEditor.GetEditor(graph, this);
-            if (this.graphEditor != graphEditor) {
+            if (this.graphEditor != graphEditor && graphEditor != null) {
                 this.graphEditor = graphEditor;
                 graphEditor.OnOpen();
             }