OUTLEN ( entity, tol, ifail )
=============================

  Outputs the tolerance value associated with an entity (face, edge or vertex).

    Can be called from the GO.

Receives:
  KI_tag_entity            *entity         --- can be face, edge or vertex

Returns:
  double                   *tol            --- returned tolerance value
  KI_cod_error             *ifail          --- failure indicator

Specific errors:
  KI_wrong_entity           unsuitable entity type

Description:
  This function outputs the tolerance value associated with 'entity'.
  The entity can be any of face, edge or vertex. Refer to SETLEN for the
  meaning of the tolerance in each case.