Function:     gds___extendsize

Purpose:      Returns extendsize set by GDST_INCR.

Category:     BASIC-GDS

File:         gds_tune.c

Author:       J.P. Terlouw

Use:          int gds___extendsize( )

Warning:      Not callable from Fortran.

Updates:      Aug 24, 1991: KGB, Document created.
              Mar  1, 1994: JPT, Modified for GDS server.