[Houdini] Make a lines connecting geohandle 0 and geohandle 1. (point wrangle)

make_lines.vfl

int prim = addprim(0, "polyline");

vector p_sphere = point(1, "P", 0);
int ptn_sphere = addpoint(0, p_sphere);

addvertex(0, prim, @ptnum);
addvertex(0, prim, ptn_sphere);