Merge pull request #16 from KG7x/patch-2

Update build.sh. Thanks @KG7x !

Author: zimbatm

build.sh

@@ -42,7 +42,7 @@ cd $BUILD_DIR
 ../fetchurl "http://www.tortall.net/projects/yasm/releases/yasm-1.2.0.tar.gz"
 ../fetchurl "http://zlib.net/zlib-1.2.8.tar.gz"
 ../fetchurl "http://www.bzip.org/1.0.6/bzip2-1.0.6.tar.gz"
-../fetchurl "http://sourceforge.net/projects/libpng/files/libpng16/1.6.3/libpng-1.6.3.tar.gz"
+../fetchurl "http://sourceforge.net/projects/libpng/files/libpng16/1.6.6/libpng-1.6.6.tar.gz"
 ../fetchurl "http://downloads.xiph.org/releases/ogg/libogg-1.3.1.tar.gz"
 ../fetchurl "http://downloads.xiph.org/releases/vorbis/libvorbis-1.3.3.tar.gz"
 ../fetchurl "http://downloads.xiph.org/releases/theora/libtheora-1.1.1.tar.bz2"