From 635c7d970c1083cb456ac8f9b2605cc71ebf0c7f Mon Sep 17 00:00:00 2001
From: Walter van Niftrik
Date: Sun, 7 Feb 2010 14:32:49 +0000
Subject: SCI: Fix VM crash when NULL_REG is passed to AvoidPath (SCI32).

svn-id: r47964
---
 engines/sci/engine/kpathing.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/engines/sci/engine/kpathing.cpp b/engines/sci/engine/kpathing.cpp
index 2f8dcb23b6..c168df3bf9 100644
--- a/engines/sci/engine/kpathing.cpp
+++ b/engines/sci/engine/kpathing.cpp
@@ -1392,7 +1392,7 @@ reg_t kAvoidPath(EngineState *s, int argc, reg_t *argv) {
 			if (argc < 7)
 				error("[avoidpath] Not enough arguments");
 
-			poly_list = GET_SEL32(s->_segMan, argv[4], SELECTOR(elements));
+			poly_list = (!argv[4].isNull() ? GET_SEL32(s->_segMan, argv[4], SELECTOR(elements)) : NULL_REG);
 			width = argv[5].toUint16();
 			height = argv[6].toUint16();
 			if (argc > 7)
-- 
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