bugfix: outside combing was skipped sometimes
bugfix: outside combing was skipped sometimes

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