Fixed cubic line "leak" on first point. (Fixes #683)
Fixed cubic line "leak" on first point. (Fixes #683)

Since lately we've done many fixes to the calculation for first/last
  points in cubic drawing - we not do not need that first "add curve".

jum/Charts,koroff/Charts,StephenVinouze/ios-charts,SereivoanYong/Charts,ConcepterDev/ios-charts,liuxuan30/Charts,SBGMobile/Charts,SereivoanYong/Charts,danielgindi/ios-charts,franqueli/ios-charts,hanquochan/Charts,danielallsopp/Charts,dtrauger/Charts,summerlove57/ios-charts,jjatie/Charts,jum/Charts,ConcepterDev/ios-charts,ConcepterDev/ios-charts,boluomeng/Charts,Eflet/Charts,hanquochan/Charts,Eflet/Charts,StephenVinouze/ios-charts,convergeeducacao/Charts,liuxuan30/ios-charts,ekohe/ios-charts,MAARK/Charts,jum/Charts,jesseXu/Charts,gjpc/ios-charts,gjpc/ios-charts,jjatie/Charts,GreenCom-Networks/ios-charts,danielgindi/Charts,danielgindi/ios-charts,koroff/Charts,liuxuan30/Charts,Shannon-s-Dreamland/Charts,SereivoanYong/Charts,FreddyZeng/Charts,aelam/Charts,FreddyZeng/Charts,jjatie/Charts,SBGMobile/Charts,icecrystal23/ios-charts,icecrystal23/ios-charts,danielgindi/ios-charts,MAARK/Charts,franqueli/ios-charts,StephenVinouze/ios-charts,FreddyZeng/Charts,duanhjlt/ios-charts,liuxuan30/Charts,koroff/Charts,liuxuan30/Charts,Eflet/Charts,danielallsopp/Charts,dtrauger/Charts,icecrystal23/ios-charts,gjpc/ios-charts,dtrauger/Charts,GreenCom-Networks/ios-charts,aelam/Charts,danielgindi/Charts,ekohe/ios-charts,LiveHappier/Charts,danielgindi/Charts,jjatie/Charts,summerlove57/ios-charts,hanquochan/Charts,MAARK/Charts,jesseXu/Charts,danielgindi/ios-charts,liuxuan30/ios-charts,FreddyZeng/Charts,SBGMobile/Charts,boluomeng/Charts,franqueli/ios-charts,shujucn/ios-charts,duanhjlt/ios-charts,MAARK/Charts,danielgindi/Charts,StephenVinouze/ios-charts,duanhjlt/ios-charts,GreenCom-Networks/ios-charts,boluomeng/Charts,liuxuan30/ios-charts,boluomeng/Charts,hanquochan/Charts,jesseXu/Charts,LiveHappier/Charts,koroff/Charts,convergeeducacao/Charts,shujucn/ios-charts,jum/Charts,aelam/Charts,icecrystal23/ios-charts,LiveHappier/Charts,dtrauger/Charts,Shannon-s-Dreamland/Charts,liuxuan30/ios-charts,summerlove57/ios-charts,GreenCom-Networks/ios-charts,ekohe/ios-charts,shujucn/ios-charts,Eflet/Charts