From cb72d3c52db91b788309432431838da0b34366fb Mon Sep 17 00:00:00 2001
From: LarsBrubaker <larsbrubaker@gmail.com>
Date: Sat, 11 Jun 2022 13:39:20 -0700
Subject: [PATCH] Fixing a problem when there is support and no holes

---
 .../SlicerConfiguration/EngineMappingsMatterSlice.cs            | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/MatterControlLib/SlicerConfiguration/EngineMappingsMatterSlice.cs b/MatterControlLib/SlicerConfiguration/EngineMappingsMatterSlice.cs
index 599f5835a..9e0eb2da6 100644
--- a/MatterControlLib/SlicerConfiguration/EngineMappingsMatterSlice.cs
+++ b/MatterControlLib/SlicerConfiguration/EngineMappingsMatterSlice.cs
@@ -633,7 +633,7 @@ namespace MatterHackers.MatterControl.SlicerConfiguration
 							mergeString += "+";
 						}
 					}
-					else if (holes.Any())
+					else if (holes?.Any() == true)
                     {
 						mergeString += ",";
                     }