Properly support png 1.5


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@375530 35697150-7ecd-e111-bb59-0022644237b5
Properly support png 1.5


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@375531 35697150-7ecd-e111-bb59-0022644237b5
Properly support png 1.5


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@375532 35697150-7ecd-e111-bb59-0022644237b5
Properly support png 1.5


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@375533 35697150-7ecd-e111-bb59-0022644237b5