10125 smatch fixes for cmd-inet

*** 20,30 ****
   */
  
  /*
   * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
   * Copyright 2017 Nexenta Systems, Inc.
!  * Copyright 2017 Joyent, Inc.
   * Copyright 2017 Gary Mills
   * Copyright (c) 2016, Chris Fraire <cfraire@me.com>.
   */
  
  #include <arpa/inet.h>
--- 20,30 ----
   */
  
  /*
   * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
   * Copyright 2017 Nexenta Systems, Inc.
!  * Copyright (c) 2018, Joyent, Inc.
   * Copyright 2017 Gary Mills
   * Copyright (c) 2016, Chris Fraire <cfraire@me.com>.
   */
  
  #include <arpa/inet.h>
*** 1634,1644 ****
          if (status != IPADM_SUCCESS)
                  return (ret);
  
          if (if_info->ifi_cflags & IFIF_L3PROTECT)
                  ret = _B_TRUE;
-         if (if_info)
                  ipadm_free_if_info(if_info);
          return (ret);
  }
  
  static boolean_t
--- 1634,1643 ----