libpng: update to 1.6.19.

srcpkgs/libpng/template

@@ -1,7 +1,7 @@
 # Template build file for 'libpng'.
 pkgname=libpng
-version=1.6.18
-revision=2
+version=1.6.19
+revision=1
 build_pie=yes
 build_style=gnu-configure
 makedepends="zlib-devel"
@@ -10,7 +10,7 @@ maintainer="Juan RP <xtraeme@voidlinux.eu>"
 homepage="http://www.libpng.org/pub/png/libpng.html"
 license="zlib"
 distfiles="ftp://ftp.simplesystems.org/pub/libpng/png/src/libpng16/libpng-${version}.tar.xz"
-checksum=2e10c13b7949883ac961db6177c516d778184432d440317e9f0391305c360963
+checksum=311c5657f53516986c67713c946f616483e3cdb52b8b2ee26711be74e8ac35e8
 
 post_install() {
 	rm -f ${DESTDIR}/usr/lib/*.la
@@ -18,7 +18,7 @@ post_install() {
 }
 
 libpng-devel_package() {
-	depends="zlib-devel libpng>=${version}_${revision}"
+	depends="${makedepends} libpng>=${version}_${revision}"
 	short_desc+=" - development files"
 	pkg_install() {
 		vmove "usr/bin/libpng*-config"