bugfix crossing infill caused by not finding intersection between polygon and scanline
bugfix crossing infill caused by not finding intersection between polygon and scanline

derekhe/CuraEngine,electrocbd/CuraEngine,markwal/CuraEngine,mspark93/CuraEngine,alephobjects/CuraEngine,jacobdai/CuraEngine-1,totalretribution/CuraEngine,foosel/CuraEngine,totalretribution/CuraEngine,uus169/CuraEngine,markwal/CuraEngine,uus169/CuraEngine,derekhe/CuraEngine,foosel/CuraEngine,pratikshashroff/pcura,fxtentacle/CuraEngine,uus169/CuraEngine,foosel/CuraEngine,electrocbd/CuraEngine,Ultimaker/CuraEngine,alex1818/CuraEngine,patrick3coffee/CuraTinyG,pratikshashroff/pcura,electrocbd/CuraEngine,ROBO3D/CuraEngine,mspark93/CuraEngine,jacobdai/CuraEngine-1,mspark93/CuraEngine,alex1818/CuraEngine,totalretribution/CuraEngine,Ultimaker/CuraEngine,patrick3coffee/CuraTinyG,patrick3coffee/CuraTinyG,ROBO3D/CuraEngine,jacobdai/CuraEngine-1,fxtentacle/CuraEngine,alephobjects/CuraEngine,pratikshashroff/pcura,alex1818/CuraEngine,markwal/CuraEngine,ROBO3D/CuraEngine,fxtentacle/CuraEngine,derekhe/CuraEngine,alephobjects/CuraEngine