Hoveron fills broken this on `tozerox` fill trace

https://codepen.io/etpinard/pen/NOQVrq

![peek 2018-11-01 12-40](https://user-images.githubusercontent.com/6675409/47865751-665cdd00-ddd3-11e8-836b-be55b3eb91e1.gif)
