Issue in the last commit made at Oct 19, 2019

[kosilin]

Good day!

The last commit at Oct 19, 2019 has introduced a new issue. Please look at the line 55 (as it seems) of the script:
stroke_width *= math.sqrt(transf[0][0] * transf[1][1])

This code will cause a domain error while scaling stroke width in case the figure being transformed has been previously flipped (mirrored) around one of the axises.

I propose to correct the problem by getting absolute value of the multiplication:
stroke_width *= math.sqrt(abs(transf[0][0] * transf[1][1]))

Best regards,
Alexey

[Klowner]

Thanks!