Comment 2 for bug 1668853

attached is a proposed patch for this bug. I will leave this here until the weekend, and if there is no adverse reaction, then I will commit it (again).

This patch is an exact duplicate of what was previously committed in rev 15003 to trunk:
https://bugs.launchpad.net/inkscape/+bug/1593963
http://bazaar.launchpad.net/~inkscape.dev/inkscape/trunk/revision/15003

This was also committed to lib2geom in github as well:
https://github.com/inkscape/lib2geom/blob/master/src/2geom/sbasis-geometric.cpp

For some inexplicable reason, this patch appears to have been reverted in trunk in rev 15047.
http://bazaar.launchpad.net/~inkscape.dev/inkscape/trunk/revision/15047#src/2geom/sbasis-geometric.cpp

It looks to me as though this last revert was probably unintentional.