Re: gEDA-user: Drill helpers generated by pcb

[DJ Delorie]

> Via[25000 85000 3999 1596 0 2399 "" ""]
> Via[30000 12500 3999 1596 0 2397 "" ""]

It does appear you're the victim of rounding.  The drill file doesn't
use the extra digits, so we should probably pre-round before grouping.