Path::to_cairo - strip out paths composed only of MoveTo
Path::to_cairo - strip out paths composed only of MoveTo

Otherwise, text-to-path set at a nonzero position will generate a lone
point at that position.

Part-of: <https://gitlab.gnome.org/GNOME/librsvg/-/merge_requests/673>

GNOME/librsvg,GNOME/librsvg,GNOME/librsvg,GNOME/librsvg