GCLSG - closes a GKS segment

       To use GKS routines, load the NCAR GKS-0A library ncarg_gks.

       #include <ncarg/gks.h>

       void gclose_seg( void );

       Copyright (C) 1987-2009
       University Corporation for Atmospheric Research
       The use of this Software is governed by a License Agreement.

UNIX                                               March 1993                                      GCLSG(3NCARG)

       GCLSG  - closes a GKS segment

       Online: gevtm, gactm, gcrsg, gcsgwk, gdsg, gqopsg, gqsgus, gssgt, gclose_seg

       Hardcopy: "User's Guide for NCAR GKS-0A Graphics"

       CALL GCLSG

       A call to GCLSG closes the currently open segment (graphics output primitives will no longer be stored in
       that segment).  GCLSG can be called only if a segment is open.