Fiducial_slam ignores fiducial_id 0

It seems fiducial markers with id 0 are actively ignored in the mapping process. No blue line is drawn between existing markers and marker id 0, and /fiducial_map does not publish fiducial_id: 0

Replacing marker 0 with any other marker fixes the issue.

Hi @wongrufus,

I saw that this was resolved on the Github ticket that you opened.

Good luck with your project!