problem wiz stumbled upon only occurs if py-imaging is installed and
py-imagingtk is not. pysolfc assumed that if py-imaging was installed,
py-imagingtk was also installed. patch-ac corrects this by simply
disabling the runtime detection of these optional dependencies.
The real issue, it seems to me, is that py-imaging installs ImageTk.py,
which needs py-imagingtk to be useful. This is why pysolfc got
confused. pkgsrc should probably be changed to install ImageTk.py in
the py-imagingtk package instead, but I'd rather not audit all
py-imaging users right now, so I'll leave that for someone else.
Bump PKGREVISION to 4.
