bugfix: primeTower memory issues (officially unrelated to CURA-414)
bugfix: primeTower memory issues (officially unrelated to CURA-414)

alephobjects/CuraEngine,ROBO3D/CuraEngine,Ultimaker/CuraEngine,ROBO3D/CuraEngine,totalretribution/CuraEngine,pratikshashroff/pcura,pratikshashroff/pcura,Ultimaker/CuraEngine,totalretribution/CuraEngine,alephobjects/CuraEngine,pratikshashroff/pcura,ROBO3D/CuraEngine,totalretribution/CuraEngine,alephobjects/CuraEngine