From 4260a91a99275d1495b0df4e901951451836a929 Mon Sep 17 00:00:00 2001
From: whitequark <whitequark@whitequark.org>
Date: Sat, 26 Dec 2015 14:06:34 +0800
Subject: [PATCH] Update libpng to 1.6.20.

libpng <=1.6.19 has security vulnerabilities.
---
 extlib/libpng | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/extlib/libpng b/extlib/libpng
index 2b667e49..5b6a6f91 160000
--- a/extlib/libpng
+++ b/extlib/libpng
@@ -1 +1 @@
-Subproject commit 2b667e49232dd36aa7ea3a7382f265fd7f97d2cd
+Subproject commit 5b6a6f914b734f38d3ea96d70bfc67acd8b47414