add yengine npe fix

Patch/0001-Fix-NPE.patch

@@ -0,0 +1,28 @@
+From ca7b50bbe4b43cc6f882e04e0adb62719cf6ffe5 Mon Sep 17 00:00:00 2001
+From: Chris <christopher@clatza.dev>
+Date: Mon, 18 Jan 2021 23:50:15 +0100
+Subject: [PATCH] Fix NPE
+
+---
+ OpenSim/Region/ScriptEngine/YEngine/XMRHeapTracker.cs | 5 ++++-
+ 1 file changed, 4 insertions(+), 1 deletion(-)
+
+diff --git a/OpenSim/Region/ScriptEngine/YEngine/XMRHeapTracker.cs b/OpenSim/Region/ScriptEngine/YEngine/XMRHeapTracker.cs
+index f3e38c421d..3b8909a46d 100644
+--- a/OpenSim/Region/ScriptEngine/YEngine/XMRHeapTracker.cs
++++ b/OpenSim/Region/ScriptEngine/YEngine/XMRHeapTracker.cs
+@@ -126,7 +126,10 @@ namespace OpenSim.Region.ScriptEngine.Yengine
+         {
+             try
+             {
+-                return lis.Size;
++                if(lis != null)
++                    return lis.Size;
++
++                return 0;
+             }
+             catch
+             {
+-- 
+2.29.2.windows.3
+