Comment 6 for bug 850311

Heh, my pcb was configured with --enable-debug so that's why I was seeing failed assertions (=crashes).
I can confirm that the fix solves the "press v over a via" problem, but I'm still able to get
a failed assertion when I switch to the solder side view.

Of course, if I don't enable the debug mode, assertions are disabled and pcb runs fine.