From de69bbd661dd3c4074e123de32b359bf4958cc1f Mon Sep 17 00:00:00 2001
From: Gymnasiast <m.o.steenbeek@gmail.com>
Date: Tue, 19 May 2020 21:25:27 +0200
Subject: [PATCH] Guard against illegal access

---
 src/openrct2/core/Imaging.h | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/openrct2/core/Imaging.h b/src/openrct2/core/Imaging.h
index 5da84a02e5..3e4824d372 100644
--- a/src/openrct2/core/Imaging.h
+++ b/src/openrct2/core/Imaging.h
@@ -35,8 +35,12 @@ struct GamePalette
 {
     PaletteBGRA Colour[PALETTE_SIZE];
 
-    const PaletteBGRA& operator[](uint16_t idx) const
+    const PaletteBGRA operator[](uint16_t idx) const
     {
+        assert(idx < PALETTE_SIZE);
+        if (idx >= PALETTE_SIZE)
+            return {};
+
         return Colour[idx];
     }