From 4b6b328bbb8b434c41f997023eb8c3fdb00e7242 Mon Sep 17 00:00:00 2001
From: Colin Snover
Date: Mon, 10 Oct 2016 09:27:49 -0500
Subject: SCI32: Check for existence of visiblePlane before dereferencing

CID 1351620.
---
 engines/sci/graphics/frameout.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/engines/sci/graphics/frameout.cpp b/engines/sci/graphics/frameout.cpp
index 94518413da..843fe5ed86 100644
--- a/engines/sci/graphics/frameout.cpp
+++ b/engines/sci/graphics/frameout.cpp
@@ -1004,6 +1004,10 @@ void GfxFrameout::calcLists(ScreenItemListList &drawLists, EraseListList &eraseL
 			_visiblePlanes.add(new Plane(plane));
 			--plane._created;
 		} else if (plane._updated) {
+			if (visiblePlane == nullptr) {
+				error("[GfxFrameout::calcLists]: Attempt to update nonexistent visible plane");
+			}
+
 			*visiblePlane = plane;
 			--plane._updated;
 		}
-- 
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