10118 libeti() NULL check after deref

*** 26,36 ****
  /*
   *      Copyright (c) 1997, by Sun Microsystems, Inc.
   *      All rights reserved.
   */
  
! #pragma ident   "%Z%%M% %I%     %E% SMI"
  
  /*LINTLIBRARY*/
  
  #include <sys/types.h>
  #include <stdlib.h>
--- 26,38 ----
  /*
   *      Copyright (c) 1997, by Sun Microsystems, Inc.
   *      All rights reserved.
   */
  
! /*
!  * Copyright (c) 2018, Joyent, Inc.
!  */
  
  /*LINTLIBRARY*/
  
  #include <sys/types.h>
  #include <stdlib.h>
*** 335,347 ****
           */
  
  int
  set_max_field(FIELD *f, int max)
  {
!         BOOLEAN onerow = OneRow(f);
  
!         if (!f || max && ((onerow && f->dcols > max) ||
              (!onerow && f->drows > max)))
                  return (E_BAD_ARGUMENT);
  
          f->maxgrow = max;
          Clr(f, GROWABLE);
--- 337,354 ----
           */
  
  int
  set_max_field(FIELD *f, int max)
  {
!         BOOLEAN onerow;
  
!         if (!f)
!                 return (E_BAD_ARGUMENT);
! 
!         onerow = OneRow(f);
! 
!         if (max && ((onerow && f->dcols > max) ||
              (!onerow && f->drows > max)))
                  return (E_BAD_ARGUMENT);
  
          f->maxgrow = max;
          Clr(f, GROWABLE);