FilletEdge crash in 3/29 WIP

This is a warning that some code snuck into the latest WIP that causes FilletEdge (and probably BlendEdge and ChamferEdge) to crash in a very specific, but not uncommon, case. If you have exactly four edges meeting at a vertex, one of them joins surfaces that are tangent and the other three are selected for filleting, Rhino will crash. Sorry about that. It will not do so in the next build. I’ve attached an example.FilletCrash.3dm (29.3 KB)