portmaster -r png- GraphicsMagic13

[Franci Nabalanci]

I started yesterday portmaster -r png- on FreeBSD 9.0 release and first
error was GhostScript which looks like cannot build with clang and when I
switched back to GCC was okay but it stopped on GraphicsMagic13:

test-suite.log:
1 of 724 tests failed.

.. contents:: :depth: 2

FAIL: test/rwlob_MNG_palete.sh (exit: 1)
Failed to write BLOB in format.

Thanks.