Properly fall back to default style for style-less shape paths
Properly fall back to default style for style-less shape paths

Fixes parts of #471

mozilla/shumway,tschneidereit/shumway,mozilla/shumway,mbebenita/shumway,yurydelendik/shumway,tschneidereit/shumway,yurydelendik/shumway,mozilla/shumway,yurydelendik/shumway,mbebenita/shumway,tschneidereit/shumway,mbebenita/shumway,mbebenita/shumway,tschneidereit/shumway,yurydelendik/shumway,mbebenita/shumway,yurydelendik/shumway,tschneidereit/shumway,mbebenita/shumway,yurydelendik/shumway,tschneidereit/shumway,mozilla/shumway,mozilla/shumway,tschneidereit/shumway,mozilla/shumway,mbebenita/shumway,yurydelendik/shumway,mozilla/shumway,tschneidereit/shumway,mbebenita/shumway,yurydelendik/shumway,mozilla/shumway