🚀 go-pugleaf

I asked for a method to create points and circles in the same way as
lines and ellipses in a viewer. Mr. John Vlissides answered that I
only have to define a PointComp by taking the code for LineComp...
I tried that just before the answer, but my problem is to define
POINT_COMP and POINT_VIEW. If I say #define POINT_COMP 9030
(like LINE_COMP), than I cannot create a point but a line again.
If I say #define POINT_COMP 9108 (the first unused number), then
I get a segmentation fault when I start the executable program.
Where are these numbers used, and what number do I have to use?
Do I have to implement any new code because of a new number?

Thanks a lot,

Carsten Hoffmann