Fix that Zigzag no end pieces may not connect a line
Fix that Zigzag no end pieces may not connect a line

CURA-4090

Ultimaker/CuraEngine,ROBO3D/CuraEngine,Ultimaker/CuraEngine,ROBO3D/CuraEngine,ROBO3D/CuraEngine,alephobjects/CuraEngine,alephobjects/CuraEngine,alephobjects/CuraEngine