From 0b6e99fa528e66bba6ca2923ed6e8ba185cfec38 Mon Sep 17 00:00:00 2001
From: Gleb Mazovetskiy <glex.spb@gmail.com>
Date: Sat, 7 Jun 2025 14:47:00 +0100
Subject: [PATCH] Fix a bug in `palette_update`

PR #8027 exposed a bug in `palette_update`.

The `first` argument in SDL palette functions always refers to the first
target index (the first source index is always 0).
---
 Source/engine/palette.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Source/engine/palette.cpp b/Source/engine/palette.cpp
index e95e00ed9..0d299b288 100644
--- a/Source/engine/palette.cpp
+++ b/Source/engine/palette.cpp
@@ -139,7 +139,7 @@ void palette_update(int first, int ncolor)
 		return;
 
 	assert(Palette);
-	if (SDLC_SetSurfaceAndPaletteColors(PalSurface, Palette.get(), system_palette.data(), first, ncolor) < 0) {
+	if (SDLC_SetSurfaceAndPaletteColors(PalSurface, Palette.get(), system_palette.data() + first, first, ncolor) < 0) {
 		ErrSdl();
 	}
 	pal_surface_palette_version++;