10122 beadm buffer over-run

@@ -25,10 +25,11 @@
  * Copyright 2015 Toomas Soome <tsoome@me.com>
  * Copyright 2015 Gary Mills
  * Copyright (c) 2015 by Delphix. All rights reserved.
  * Copyright 2017 Jason King
  * Copyright 2018 OmniOS Community Edition (OmniOSce) Association.
+ * Copyright (c) 2018, Joyent, Inc.
  */
 
 /*
  * System includes
  */

@@ -211,11 +212,10 @@
         col[1].col_name = _("Active");
         col[2].col_name = _("Mountpoint");
         col[3].col_name = _("Space");
         col[4].col_name = _("Policy");
         col[5].col_name = _("Created");
-        col[6].col_name = NULL;
 
         switch (be_fmt) {
         case BE_FMT_ALL:
                 col[0].col_name = _("BE/Dataset/Snapshot");
                 break;