12259 CTF shouldn't assume enum size

*** 20,30 ****
   */
  
  /*
   * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
   * Copyright (c) 2012, 2014 by Delphix. All rights reserved.
!  * Copyright (c) 2015 Joyent, Inc. All rights reserved.
   */
  
  #include <strings.h>
  #include <stdlib.h>
  #include <limits.h>
--- 20,30 ----
   */
  
  /*
   * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
   * Copyright (c) 2012, 2014 by Delphix. All rights reserved.
!  * Copyright 2020 Joyent, Inc.
   */
  
  #include <strings.h>
  #include <stdlib.h>
  #include <limits.h>
*** 692,702 ****
          (void) snprintf(n, sizeof (n), "enum %s", name ? name : "(anon)");
  
          if (name != NULL && (type = ctf_lookup_by_name(ctfp, n)) != CTF_ERR) {
                  if (ctf_enum_iter(ctfp, type, dt_decl_hasmembers, NULL))
                          xyerror(D_DECL_TYPERED, "type redeclared: %s\n", n);
!         } else if ((type = ctf_add_enum(ctfp, flag, name)) == CTF_ERR) {
                  xyerror(D_UNKNOWN, "failed to define %s: %s\n",
                      n, ctf_errmsg(ctf_errno(ctfp)));
          }
  
          ddp->dd_ctfp = ctfp;
--- 692,702 ----
          (void) snprintf(n, sizeof (n), "enum %s", name ? name : "(anon)");
  
          if (name != NULL && (type = ctf_lookup_by_name(ctfp, n)) != CTF_ERR) {
                  if (ctf_enum_iter(ctfp, type, dt_decl_hasmembers, NULL))
                          xyerror(D_DECL_TYPERED, "type redeclared: %s\n", n);
!         } else if ((type = ctf_add_enum(ctfp, flag, name, 0)) == CTF_ERR) {
                  xyerror(D_UNKNOWN, "failed to define %s: %s\n",
                      n, ctf_errmsg(ctf_errno(ctfp)));
          }
  
          ddp->dd_ctfp = ctfp;