ENEQGE ( geom1, geom2, same, ifail )
====================================

  Enquire whether two geometries are equivalent.

Receives:
  KI_tag_geometry          *geom1          --- first geometric item
  KI_tag_geometry          *geom2          --- second geometric item

Returns:
  KI_cod_logical           *same           --- result. KI_true if same
  KI_cod_error             *ifail          --- failure indicator

Specific errors:
  KI_wrong_sub_type         only surfaces curves and points valid
  KI_invalid_geometry       curve fails to pass checks
                            surface fails to pass checks
  KI_bad_type_combn         geom1 and 2 are of different types

Description:
  ENEQGE will compare two points, two curves, or two surfaces. If they
  occupy the same position(s) in space, 'same' will return KI_true,
  otherwise 'same' will return KI_false.

  All comparisons of length or position are made to within a fixed
  resolution (see OUMODP).

  ENEQGE is not guaranteed to detect equivalence but it will never claim two
  entities are equivalent when they are not.

  Any curve or surface must be capable of passing the checks imposed by CHCKEN.
  The self intersection check is only performed if the appropriate option is set
  (see SEINTP).