NAME
       MPE_Line_thickness -  Sets thickness of lines
SYNOPSIS
       #include "mpe.h"
       int MPE_Line_thickness( graph, thickness )
       MPE_XGraph graph;
       int thickness;
INPUT PARAMETERS
       graph  - MPE graphics handle
       thickness
              - integer specifying how many pixels wide lines should be
NOTES FOR FORTRAN INTERFACE
       The  Fortran  interface  to  this  routine  is  different  from  its  C
       counterpart and it has an additional argument, ierr, at the end of  the
       argument  list,  i.e. the returned function value (the error code) in C
       interface is returned as the additional argument in Fortran  interface.
       The Fortran interface is invoked with the CALL statement.
       All  MPI  and  MPE  objects, MPI_Comm, MPE_XGraph and MPE_Color, are of
       type INTEGER in Fortran.
LOCATION
       mpe_graphics.c
                                   12/6/2001             MPE_Line_thickness(4)