hachure fill is missing sometimes

[fskpf]

When randomize is enabled, the hachure fill is missing sometimes.

For example, test this fiddle: https://jsfiddle.net/d7xjk5qb/ (run it multiple times) which reproduces it directly with Roughjs. Note the hachureGap value. Changing it to integer or .5 values makes it work.

According to Roughjs hachureGap is a numerical value that describes the average distance in pixels and the hachure-fill implementation assumes integer values ((iteration % gap === 0)).

There, svg2roughjs should make sure to use random integer values here.