File CVE-2017-5628.patch of Package mupdf

From 8f62ea10a0af68e56d5c00720523ebcba13c2e6a Mon Sep 17 00:00:00 2001
From: Tor Andersson <tor.andersson@gmail.com>
Date: Tue, 24 Jan 2017 14:32:14 +0100
Subject: [PATCH] Fix 697496: Check NAN before accessing array in MakeDay().

---
 jsdate.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/jsdate.c b/jsdate.c
index 2b43edf..6efbb60 100644
--- a/jsdate.c
+++ b/jsdate.c
@@ -207,12 +207,17 @@ static double MakeDay(double y, double m, double date)
 	};
 
 	double yd, md;
+	int im;
 
 	y += floor(m / 12);
 	m = pmod(m, 12);
 
+	im = (int)m;
+	if (im < 0 || im >= 12)
+		return NAN;
+
 	yd = floor(TimeFromYear(y) / msPerDay);
-	md = firstDayOfMonth[InLeapYear(y)][(int)m];
+	md = firstDayOfMonth[InLeapYear(y)][im];
 
 	return yd + md + date - 1;
 }
-- 
2.9.1