version up : libpng 1.2.51, 1.5.18 and 1.6.9.

component/libpng/buildout.cfg

@@ -18,16 +18,16 @@ environment =
 
 [libpng12]
 <= libpng-common
-url = http://download.sourceforge.net/libpng/libpng-1.2.50.tar.bz2
-md5sum = 717caa58e9c71a80820eb38c4f4d6ec3
+url = http://download.sourceforge.net/libpng/libpng-1.2.51.tar.xz
+md5sum = 4efba67fa5aa2b785c6fcec2cc3e90c9
 
 [libpng15]
 <= libpng-common
-url = http://download.sourceforge.net/libpng/libpng-1.5.17.tar.xz
-md5sum = 6509aba334bbd87613d2d353a2af44d6
+url = http://download.sourceforge.net/libpng/libpng-1.5.18.tar.xz
+md5sum = 23fb6a0e9f4dbaab7b34b6fd317a4f2d
 
 [libpng]
 <= libpng-common
-url = http://download.sourceforge.net/libpng/libpng-1.6.8.tar.xz
-md5sum = 51ce71a1642cdde1f4485a7ff82193c0
+url = http://download.sourceforge.net/libpng/libpng-1.6.9.tar.xz
+md5sum = 14e037c5c9f1db16844760285ad5c2d6
 so_version = 16