qt build failure due to libmng build failure

[Ludwig]

qt3-mac and qt4-mac both have deps on libmng with no variants omitting
it, even though it's just animated PNG support.


--->  Fetching libmng
--->  Verifying checksum(s) for libmng
--->  Checksumming libmng-1.0.9.tar.gz
--->  Extracting libmng
--->  Extracting libmng-1.0.9.tar.gz
--->  Configuring libmng
/opt/local/share/aclocal/xmms.m4:17: warning: underquoted definition
of XMMS_TEST_VERSION
/opt/local/share/aclocal/xmms.m4:17:   run info '(automake)Extending aclocal'
/opt/local/share/aclocal/xmms.m4:17:   or see
http://sources.redhat.com/automake/automake.html#Extending-aclocal
/opt/local/bin/gm4:configure.in:193: recursion limit of 1024 exceeded,
use -L<N> to change it
autom4te: /opt/local/bin/gm4 failed with exit status: 1
aclocal: autom4te failed with exit status: 1
autoreconf: aclocal failed with exit status: 1
Error: Target org.macports.configure returned: shell command "cd
'/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_graphics_libmng/work/libmng-1.0.9'
&& LIBTOOLIZE=glibtoolize autoreconf -fi" returned error 1
Command output: /opt/local/share/aclocal/xmms.m4:17: warning:
underquoted definition of XMMS_TEST_VERSION
/opt/local/share/aclocal/xmms.m4:17:   run info '(automake)Extending aclocal'
/opt/local/share/aclocal/xmms.m4:17:   or see
http://sources.redhat.com/automake/automake.html#Extending-aclocal
/opt/local/bin/gm4:configure.in:193: recursion limit of 1024 exceeded,
use -L<N> to change it
autom4te: /opt/local/bin/gm4 failed with exit status: 1
aclocal: autom4te failed with exit status: 1
autoreconf: aclocal failed with exit status: 1

Warning: the following items did not execute (for libmng):
org.macports.activate org.macports.configure org.macports.build
org.macports.destroot org.macports.install
Error: The following dependencies failed to build: libmng
Error: Status 1 encountered during processing.