From 23e6d861fcdfd9c4f1b9eb85145a3410004983f4 Mon Sep 17 00:00:00 2001
From: Jonathan G Rennison <j.g.rennison@gmail.com>
Date: Fri, 10 Jun 2022 17:56:56 +0100
Subject: [PATCH] VarAction2: Ensure that store simplification can't break var
 7B

---
 src/newgrf.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/newgrf.cpp b/src/newgrf.cpp
index ca035f8d9c..b6fef3ece7 100644
--- a/src/newgrf.cpp
+++ b/src/newgrf.cpp
@@ -6877,7 +6877,7 @@ static void OptimiseVarAction2DeterministicSpriteGroupSimplifyStores(Determinist
 				}
 				const DeterministicSpriteGroupAdjust &next = group->adjusts[j];
 				if (next.operation == DSGA_OP_RST) {
-					ok = true;
+					ok = (next.variable != 0x7B);
 					break;
 				}
 				if (is_constant && next.operation == DSGA_OP_STO_NC) {