From 1279b23f620503356e4034ddb03317fbc31cdf66 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Matthias=20Mail=C3=A4nder?= <matthias@mailaender.name>
Date: Thu, 8 Aug 2013 21:19:06 +0200
Subject: [PATCH] check null because Nullable object must have a value

fixes #3642
---
 OpenRA.Mods.RA/AI/HackyAI.cs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/OpenRA.Mods.RA/AI/HackyAI.cs b/OpenRA.Mods.RA/AI/HackyAI.cs
index c0201ce051..7437b08734 100644
--- a/OpenRA.Mods.RA/AI/HackyAI.cs
+++ b/OpenRA.Mods.RA/AI/HackyAI.cs
@@ -652,7 +652,9 @@ namespace OpenRA.Mods.RA.AI
 				if (owner.IsEmpty) return;
 				if (!owner.TargetIsValid)
 				{
-					owner.Target = owner.bot.FindClosestEnemy(AverageUnitsPosition(owner.units).Value.CenterPosition, WRange.FromCells(8));
+					var circaPostion = AverageUnitsPosition(owner.units);
+					if (circaPostion == null) return;
+					owner.Target = owner.bot.FindClosestEnemy(circaPostion.Value.CenterPosition, WRange.FromCells(8));
 
 					if (owner.Target == null)
 					{