IDPOFV ( vertex, point, ifail )
===============================

  Identify point of vertex

    Can be called from the GO.

Receives:
  KI_tag_vertex            *vertex         --- vertex

Returns:
  KI_tag_point             *point          --- point
  KI_cod_error             *ifail          --- failure indicator

Specific errors:
  KI_missing_geom           The given vertex has no associated point

Description:
  The point associated with the given vertex is returned.