From 3bac0aabd98d52eb2e5d33c8e192961f5f7368a1 Mon Sep 17 00:00:00 2001
From: krzys-h <krzys_h@interia.pl>
Date: Fri, 11 Nov 2016 17:26:37 +0100
Subject: [PATCH] Fix buffer overrun when rendering goto() debug texture,
 closes #841

---
 src/graphics/engine/engine.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/graphics/engine/engine.cpp b/src/graphics/engine/engine.cpp
index b2aa631f..3110cd37 100644
--- a/src/graphics/engine/engine.cpp
+++ b/src/graphics/engine/engine.cpp
@@ -4404,6 +4404,9 @@ void CEngine::UpdateGroundSpotTextures()
                     {
                         int px = x / 4.0f / 254.0f * size.x;
                         int py = y / 4.0f / 254.0f * size.y;
+                        // This can happen because the shadow??.png textures have a 1 pixel margin around them
+                        if (px < 0 || px >= size.x || py < 0 || py >= size.y)
+                            continue;
                         shadowImg.SetPixelInt(Math::IntPoint(x-min.x, y-min.y), m_displayGotoImage->GetPixelInt(Math::IntPoint(px, py)));
                     }
                 }