From 92d207ba0f83d513894e23c99bcb8fa5c0aec653 Mon Sep 17 00:00:00 2001
From: Eugene Sandulenko <sev@scummvm.org>
Date: Wed, 26 Feb 2020 20:35:02 +0100
Subject: [PATCH] DIRECTOR: Added sanity checks to func_cursor()

---
 engines/director/lingo/lingo-funcs.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/engines/director/lingo/lingo-funcs.cpp b/engines/director/lingo/lingo-funcs.cpp
index 26e11b79703..581e6b5e99c 100644
--- a/engines/director/lingo/lingo-funcs.cpp
+++ b/engines/director/lingo/lingo-funcs.cpp
@@ -345,6 +345,15 @@ void Lingo::func_cursor(int c, int m) {
 			return;
 		}
 
+		if (score->_loadedCast->getVal(c)->_surface == nullptr) {
+			warning("cursor: empty sprite %d surface", c);
+			return;
+		}
+		if (score->_loadedCast->getVal(m)->_surface == nullptr) {
+			warning("cursor: empty sprite %d surface", m);
+			return;
+		}
+
 		byte *assembly = (byte *)malloc(16 * 16);
 		byte *dst = assembly;