From 0b18ab6978092a89131316c3d79ba3c1d8453b06 Mon Sep 17 00:00:00 2001
From: Geoff McLane <ubuntu@geoffair.info>
Date: Mon, 30 Nov 2020 17:54:06 +0100
Subject: [PATCH] Is. #891 Ensure no buffer over-run

Fixes #891
---
 src/streamio.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/streamio.c b/src/streamio.c
index d23f056..5a95b65 100644
--- a/src/streamio.c
+++ b/src/streamio.c
@@ -724,7 +724,7 @@ static const uint Mac2Unicode[128] =
 /* Function to convert from MacRoman to Unicode */
 uint TY_(DecodeMacRoman)(uint c)
 {
-    if (127 < c)
+    if (127 < c && c < 256) /* Is. #891 */
         c = Mac2Unicode[c - 128];
     return c;
 }