fix: don't fill gaps for outer wall when spiralize is enabled (CURA-3152)
fix: don't fill gaps for outer wall when spiralize is enabled (CURA-3152)

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