bugfix: isRetracted was used instead of prime_amount (CURA-414)
bugfix: isRetracted was used instead of prime_amount (CURA-414)

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