drt: Integer overflow results in tracks outside die area
drt: Integer overflow results in tracks outside die area

Integer overflow in routeNet_postAstarPatchMinAreaVio causes tracks to
be created that are much longer than they should be. I've noticed this
on a few larger sky130hd designs on the metal 5 layer.

The-OpenROAD-Project/OpenROAD,QuantamHD/OpenROAD,QuantamHD/OpenROAD,The-OpenROAD-Project/OpenROAD,QuantamHD/OpenROAD,The-OpenROAD-Project/OpenROAD,QuantamHD/OpenROAD,QuantamHD/OpenROAD,The-OpenROAD-Project/OpenROAD,The-OpenROAD-Project/OpenROAD