Fix CVE-2016-7563:

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-7563
http://bugs.ghostscript.com/show_bug.cgi?id=697136

Patch copied from upstream source repository:
http://git.ghostscript.com/?p=mujs.git;a=commitdiff;h=f8234d830e17fc5e8fe09eb76d86dad3f6233c59

From f8234d830e17fc5e8fe09eb76d86dad3f6233c59 Mon Sep 17 00:00:00 2001
From: Tor Andersson <tor.andersson@artifex.com>
Date: Tue, 20 Sep 2016 17:11:32 +0200
Subject: [PATCH] Fix bug 697136.

We were unconditionally reading the next character if we encountered
a '*' in a multi-line comment; possibly reading past the end of
the input.
---
 jslex.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/jslex.c b/jslex.c
index 7b80800..cbd0eeb 100644
--- a/thirdparty/mujs/jslex.c
+++ b/thirdparty/mujs/jslex.c
@@ -225,7 +225,8 @@ static int lexcomment(js_State *J)
 			if (jsY_accept(J, '/'))
 				return 0;
 		}
-		jsY_next(J);
+		else
+			jsY_next(J);
 	}
 	return -1;
 }
-- 
2.10.2

