gEDA-dev: PCB-HID patch - subtle behavior changes

[DJ Delorie]

> Slightly more ambitious patch dealing with PrintFab position
> on a PostScript page.  When the drill list fits "naturally",
> no offset is added, which makes me happy.  When the drill list
> would otherwise fall off the left edge of the paper, just enough
> offset is added to keep that from happening, which should make
> DJ a little happier.  This does set up the hooks for rescaling,
> if DJ wants to take that on.

Finally got around to applying this.  Thanks!