From 8706a2aeaf4dfead8a0bef4c92c9648e898f96af Mon Sep 17 00:00:00 2001
From: John Lewin <lewin76@gmail.com>
Date: Wed, 25 Sep 2019 10:51:50 -0700
Subject: [PATCH] Guard for null

- Issue MatterHackers/MatterControl#4665
MC on macOS crashes when exporting G-code
---
 MatterControlLib/CustomWidgets/ExportPrintItemPage.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/MatterControlLib/CustomWidgets/ExportPrintItemPage.cs b/MatterControlLib/CustomWidgets/ExportPrintItemPage.cs
index 1b9bff7b3..23b1f3f49 100644
--- a/MatterControlLib/CustomWidgets/ExportPrintItemPage.cs
+++ b/MatterControlLib/CustomWidgets/ExportPrintItemPage.cs
@@ -193,7 +193,7 @@ namespace MatterHackers.MatterControl
 					return;
 				}
 
-				DoExport(libraryItems, printer, activePlugin, centerOnBed, showInFolderAfterSave.Checked);
+				DoExport(libraryItems, printer, activePlugin, centerOnBed, showInFolderAfterSave?.Checked == true);
 
 				this.Parent.CloseOnIdle();
 			};