10142 smatch fix for who

*** 28,37 ****
--- 28,41 ----
   * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
  /*
+  * Copyright (c) 2018, Joyent, Inc.
+  */
+ 
+ /*
   *      This program analyzes information found in /var/adm/utmpx
   *
   *      Additionally information is gathered from /etc/inittab
   *      if requested.
   *
*** 696,706 ****
          }
  
          /*
           *      Get remote host from utmpx structure
           */
!         if (utmpp && utmpp->ut_host[0])
                  (void) printf("\t(%.*s)", sizeof (utmpp->ut_host),
                      utmpp->ut_host);
  
          /*
           *      Now, put on the trailing EOL
--- 700,710 ----
          }
  
          /*
           *      Get remote host from utmpx structure
           */
!         if (utmpp->ut_host[0])
                  (void) printf("\t(%.*s)", sizeof (utmpp->ut_host),
                      utmpp->ut_host);
  
          /*
           *      Now, put on the trailing EOL