can't build png port

[h]

/usr/ports/graphics/png

>> libpng-patch00-pngrtran-filler-RRGGBB-overflow.txt doesn't seem to exist 
in /usr/ports/distfiles/.
>> Attempting to fetch from ftp://swrinde.nde.swri.edu/pub/png/src/.
fetch: 
ftp://swrinde.nde.swri.edu/pub/png/src/libpng-patch00-pngrtran-filler-RRGGBB-overflow.txt: 
size of remote file is not known
fetch: libpng-patch00-pngrtran-filler-RRGGBB-overflow.txt: local file (1130 
bytes) is longer than remote file (-1 bytes)
>> Attempting to fetch from 
http://heanet.dl.sourceforge.net/sourceforge/libpng/.
fetch: 
http://heanet.dl.sourceforge.net/sourceforge/libpng/libpng-patch00-pngrtran-filler-RRGGBB-overflow.txt: 
Requested Range Not Satisfiable
>> Attempting to fetch from 
http://aleron.dl.sourceforge.net/sourceforge/libpng/.
fetch: 
http://aleron.dl.sourceforge.net/sourceforge/libpng/libpng-patch00-pngrtran-filler-RRGGBB-overflow.txt: 
Requested Range Not Satisfiable
>> Attempting to fetch from http://umn.dl.sourceforge.net/sourceforge/libpng/.
fetch: 
http://umn.dl.sourceforge.net/sourceforge/libpng/libpng-patch00-pngrtran-filler-RRGGBB-overflow.txt: 
Requested Range Not Satisfiable
>> Attempting to fetch from 
http://belnet.dl.sourceforge.net/sourceforge/libpng/.
fetch: 
http://belnet.dl.sourceforge.net/sourceforge/libpng/libpng-patch00-pngrtran-filler-RRGGBB-overflow.txt: 
Requested Range Not Satisfiable
>> Attempting to fetch from 
http://voxel.dl.sourceforge.net/sourceforge/libpng/.
fetch: 
http://voxel.dl.sourceforge.net/sourceforge/libpng/libpng-patch00-pngrtran-filler-RRGGBB-overflow.txt: 
Requested Range Not Satisfiable
>> Attempting to fetch from 
http://optusnet.dl.sourceforge.net/sourceforge/libpng/.
fetch: 
http://optusnet.dl.sourceforge.net/sourceforge/libpng/libpng-patch00-pngrtran-filler-RRGGBB-overflow.txt: 
Requested Range Not Satisfiable
>> Attempting to fetch from 
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/distfiles/.
fetch: 
ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/distfiles/libpng-patch00-pngrtran-filler-RRGGBB-overflow.txt: 
Not Found
>> Couldn't fetch it - please try to retrieve this
>> port manually into /usr/ports/distfiles/ and try again.
*** Error code 1

Stop in /usr/ports/graphics/png.
*** Error code 1

Stop in /usr/ports/graphics/png.