libpng: Update to 1.6.32 (#2842)

mingw-w64-libpng/PKGBUILD

@@ -3,7 +3,7 @@
 _realname=libpng
 pkgbase=mingw-w64-${_realname}
 pkgname="${MINGW_PACKAGE_PREFIX}-${_realname}"
-pkgver=1.6.31
+pkgver=1.6.32
 pkgrel=1
 arch=('any')
 pkgdesc="A collection of routines used to create PNG format graphics (mingw-w64)"
@@ -15,9 +15,9 @@ url="http://www.libpng.org/pub/png/libpng.html"
 options=('strip' '!libtool' 'staticlibs')
 source=("https://downloads.sourceforge.net/sourceforge/libpng/${_realname}-${pkgver}.tar.xz"{,.asc}
         "https://downloads.sourceforge.net/project/apng/libpng/libpng16/${_realname}-${pkgver}-apng.patch.gz")
-sha256sums=('232a602de04916b2b5ce6f901829caf419519e6a16cc9cd7c1c91187d3ee8b41'
+sha256sums=('c918c3113de74a692f0a1526ce881dc26067763eb3915c57ef3a0f7b6886f59b'
             'SKIP'
-            'a10645f0af2aa23e0f437b2b7ce784c1398ba9e05555a1b61fee510bab22c227')
+            '63a80ad55601369622a0015bee915875d430f52c4d35ded80cf9fbdf17eacbbf')
 validpgpkeys=('8048643BA2C840F4F92A195FF54984BFA16C640F')  # Glenn Randers-Pehrson (mozilla) <glennrp+bmo@gmail.com>
 
 prepare() {