From 8c881e847ec2fa107dc2c82a403256ddd1de0a37 Mon Sep 17 00:00:00 2001
From: Oliver Schmidt <ol.sc@web.de>
Date: Wed, 10 Jan 2024 01:51:03 +0100
Subject: [PATCH] Avoid undefined memory read access.

---
 src/apple2/platA2.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/apple2/platA2.c b/src/apple2/platA2.c
index dacc5cd..a5fc04f 100644
--- a/src/apple2/platA2.c
+++ b/src/apple2/platA2.c
@@ -218,7 +218,11 @@ void plat_DrawSquare(char position)
         inv = blackWhite ^ (piece & PIECE_WHITE) != 0;
     }
     else
+    {
         rop = blackWhite ? ROP_WHITE : ROP_BLACK;
+        inv = 0;
+        piece = 1;
+    }
 
     hires_Draw(2+x*BOARD_PIECE_WIDTH,14+y*BOARD_PIECE_HEIGHT,
                BOARD_PIECE_WIDTH,BOARD_PIECE_HEIGHT,rop,