From 9c52709ea80b7994803c0cac8d41b4fbcd04e9ab Mon Sep 17 00:00:00 2001
From: Tor Andersson <tor@ghostscript.com>
Date: Mon, 23 Feb 2009 21:26:52 +0100
Subject: Avoid sign-extension troubles in CMap parsing.

---
 mupdf/pdf_cmap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mupdf/pdf_cmap.c b/mupdf/pdf_cmap.c
index b09d69fd..f435f9ec 100644
--- a/mupdf/pdf_cmap.c
+++ b/mupdf/pdf_cmap.c
@@ -594,7 +594,7 @@ static int codefromstring(char *buf, int len)
 {
 	int a = 0;
 	while (len--)
-		a = (a << 8) | *buf++;
+		a = (a << 8) | *(unsigned char *)buf++;
 	return a;
 }
 
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