version up : libpng 1.5.14.

component/libpng/buildout.cfg

 [buildout]
 extends =
+  ../xz-utils/buildout.cfg
   ../zlib/buildout.cfg
 
 parts =
@@ -11,6 +12,7 @@ recipe = hexagonit.recipe.cmmi
 configure-options =
   --disable-static
 environment =
+  PATH=${xz-utils:location}/bin:%(PATH)s
   CPPFLAGS =-I${zlib:location}/include
   LDFLAGS =-L${zlib:location}/lib -Wl,-rpath=${zlib:location}/lib
 
@@ -21,5 +23,5 @@ md5sum = 717caa58e9c71a80820eb38c4f4d6ec3
 
 [libpng]
 <= libpng-common
-url = http://download.sourceforge.net/libpng/libpng-1.5.13.tar.bz2
-md5sum = 186b3098d1ef844f76681bc69968efe2
+url = http://download.sourceforge.net/libpng/libpng-1.5.14.tar.xz
+md5sum = 94284b01d62ca43c5eb3f6702db08ed8