From aef8d2b04bfc2f3e28a5b58e55a7a27fa9da74ee Mon Sep 17 00:00:00 2001
From: Johannes Schickel
Date: Mon, 8 Jun 2009 17:47:37 +0000
Subject: Fix out of bounds memory access in Screen::drawShape.

svn-id: r41379
---
 engines/kyra/screen.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/engines/kyra/screen.cpp b/engines/kyra/screen.cpp
index 2b3a9366e6..1a28f9b48f 100644
--- a/engines/kyra/screen.cpp
+++ b/engines/kyra/screen.cpp
@@ -1409,6 +1409,9 @@ void Screen::drawShape(uint8 pageNum, const uint8 *shapeData, int x, int y, int
 		_dsOffscreenLeft /= _dsScaleW;
 	}
 
+	if (shapeHeight <= 0 || shpWidthScaled1 <= 0)
+		return;
+
 	if (pageNum == 0 || pageNum == 1)
 		addDirtyRect(x, y, shpWidthScaled1, shapeHeight);
 	clearOverlayRect(pageNum, x, y, shpWidthScaled1, shapeHeight);
-- 
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