version up : libpng-1.5.4 including security fixes, remove libpng-1.2 that is no longer used

component/libpng/buildout.cfg

@@ -3,7 +3,6 @@ extends =
   ../zlib/buildout.cfg
 
 parts =
-  libpng12
   libpng
 
 [libpng-common]
@@ -14,12 +13,7 @@ environment =
   CPPFLAGS =-I${zlib:location}/include
   LDFLAGS =-L${zlib:location}/lib -Wl,-rpath=${zlib:location}/lib
 
-[libpng12]
-<= libpng-common
-url = http://download.sourceforge.net/libpng/libpng-1.2.44.tar.bz2
-md5sum = e3ac7879d62ad166a6f0c7441390d12b
-
 [libpng]
 <= libpng-common
-url = http://download.sourceforge.net/libpng/libpng-1.5.2.tar.bz2
-md5sum = a003b37ed9afb0d9164eb7228421057c
+url = http://download.sourceforge.net/libpng/libpng-1.5.4.tar.bz2
+md5sum = b43afe39237b69859522455b215f9e85