optimization: no mesh offset is offset is zero
optimization: no mesh offset is offset is zero

ROBO3D/CuraEngine,mspark93/CuraEngine,pratikshashroff/pcura,ROBO3D/CuraEngine,uus169/CuraEngine,alex1818/CuraEngine,fxtentacle/CuraEngine,totalretribution/CuraEngine,alex1818/CuraEngine,totalretribution/CuraEngine,uus169/CuraEngine,fxtentacle/CuraEngine,patrick3coffee/CuraTinyG,patrick3coffee/CuraTinyG,alephobjects/CuraEngine,totalretribution/CuraEngine,pratikshashroff/pcura,alex1818/CuraEngine,alephobjects/CuraEngine,ROBO3D/CuraEngine,fxtentacle/CuraEngine,markwal/CuraEngine,markwal/CuraEngine,patrick3coffee/CuraTinyG,pratikshashroff/pcura,uus169/CuraEngine,Ultimaker/CuraEngine,markwal/CuraEngine,Ultimaker/CuraEngine,alephobjects/CuraEngine,mspark93/CuraEngine,mspark93/CuraEngine