Fix to FlattenPen. Iteration started on 0, rather than the first step. Also in _curveToOne the currentPt was not updated properly.
Fix to FlattenPen. Iteration started on 0, rather than the first step. Also in _curveToOne the currentPt was not updated properly.

git-svn-id: 68c5a305180a392494b23cb56ff711ec9d5bf0e2@244 b5fa9d6c-a76f-4ffd-b3cb-f825fc41095c

daltonmaag/robofab,anthrotype/robofab,schriftgestalt/robofab,schriftgestalt/robofab,bitforks/robofab,miguelsousa/robofab,anthrotype/robofab,jamesgk/robofab,daltonmaag/robofab,miguelsousa/robofab,jamesgk/robofab,fonttools/fonttools,moyogo/robofab,adrientetar/robofab,moyogo/robofab,googlefonts/fonttools