From 2d27c0a7640c1ce8e96538f1425ef86a5c44b6c6 Mon Sep 17 00:00:00 2001
From: Tim Felgentreff <timfelgentreff@gmail.com>
Date: Mon, 2 May 2022 21:40:39 +0200
Subject: [PATCH] add assertions to avoid crash with wrongly indexed graphics

---
 src/stratagus/player.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/stratagus/player.cpp b/src/stratagus/player.cpp
index 59668dca5..86be75d57 100644
--- a/src/stratagus/player.cpp
+++ b/src/stratagus/player.cpp
@@ -1287,6 +1287,8 @@ void GraphicPlayerPixels(int colorIndex, const CGraphic &sprite)
 
 	Assert(SDL_MUSTLOCK(sprite.Surface) == 0);
 	std::vector<SDL_Color> sdlColors = std::vector<SDL_Color>(PlayerColorsRGB[colorIndex].begin(), PlayerColorsRGB[colorIndex].end());
+	Assert(sprite.Surface->format->palette);
+	Assert(sprite.Surface->format->palette->ncolors > PlayerColorIndexStart + PlayerColorIndexCount);
 	SDL_SetPaletteColors(sprite.Surface->format->palette, &sdlColors[0], PlayerColorIndexStart, PlayerColorIndexCount);
 	if (sprite.SurfaceFlip) {
 		SDL_SetPaletteColors(sprite.SurfaceFlip->format->palette, &sdlColors[0], PlayerColorIndexStart, PlayerColorIndexCount);