pythonmagick ambuguous ssize bug + patch

Hi all,

I've bumped into a bug in pythonmagick 0.9.5 this afternoon,
essentially the same as described here
<http://permalink.gmane.org/gmane.comp.video.image-magick.bugs/3292>.
I provided a patch against 0.9.5 that makes the package build again at
<http://bugs.gentoo.org/show_bug.cgi?id=371033> -- this is really just
shoving the "using namespace boost::python;" behind "#include
<Magick++.h>".

Cheers,
Nico