From 590971f4aee28c29dea1e9c7ee08cdf431b1360a Mon Sep 17 00:00:00 2001
From: CCHyper <73803386+CCHyper@users.noreply.github.com>
Date: Wed, 22 Feb 2023 20:06:25 +0000
Subject: [PATCH] Fixes a crash in RulesClassExtension::Fixup if HouseTypes had
 a count of zero.

---
 src/extensions/rules/rulesext.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/extensions/rules/rulesext.cpp b/src/extensions/rules/rulesext.cpp
index 05220ebd9..b10fb90cc 100644
--- a/src/extensions/rules/rulesext.cpp
+++ b/src/extensions/rules/rulesext.cpp
@@ -614,7 +614,10 @@ void RulesClassExtension::Fixups(CCINIClass &ini)
 
     }
 
-    HouseTypeClass *housetype = HouseTypes[HOUSE_NOD];
+    /**
+     *  Ensure at least two HouseTypes are defined before performing this fixup case.
+     */
+    HouseTypeClass *housetype = HouseTypes.Count() >= 2 ? HouseTypes[HOUSE_NOD] : nullptr;
     if (housetype) {
 
         /**