Improve performance when checking way for self-intersection when drawing
Improve performance when checking way for self-intersection when drawing

openstreetmap/iD,AndreasHae/iD,kartta-labs/iD,kartta-labs/iD,openstreetmap/iD,kartta-labs/iD,AndreasHae/iD,AndreasHae/iD,openstreetmap/iD,morray/iD,morray/iD,digidem/iD,digidem/iD