Comment 2 for bug 699152

this has come up somewhere else too. Perhaps the real bug is you can create this by resizing a via but then when the file is loaded the next time (causing the via to be created) it is dropped due to the code you point out here. I'm thinking what should really happen is that you get a DRC violation or at an absolute minimum, a warning. I just added a warning when this happens but thats not what I want for a longer term solution.

I think the proposed code change isn't quite right. You need to look at drill sizes to see if a via will get chopped by another vias drill hole. But as I said, a better fix is to allow anything but give a DRC warning.