Fix order of parameter initialisation
Fix order of parameter initialisation

This caused a compiler warning.
totalretribution/CuraEngine,markwal/CuraEngine,totalretribution/CuraEngine,markwal/CuraEngine,pratikshashroff/pcura,Ultimaker/CuraEngine,alephobjects/CuraEngine,pratikshashroff/pcura,ROBO3D/CuraEngine,pratikshashroff/pcura,totalretribution/CuraEngine,alephobjects/CuraEngine,Ultimaker/CuraEngine,alephobjects/CuraEngine,markwal/CuraEngine,ROBO3D/CuraEngine,ROBO3D/CuraEngine