breakage from r99712

[Ryan Schmidt]

On Nov 17, 2012, at 14:50, Jack Howarth <howarth at bromo.med.uc.edu> wrote:

> I guess in the near term we could modify the pymol startup script to
> test if the +x11 variant of tk is active as well as the non-variant
> of tcl and exit with appropriate error messages if they aren't. Not

I think that's what Jeremy Lavergne was suggesting when he said you could use the active_variants portgroup.