10125 smatch fixes for cmd-inet

*** 6,15 ****
--- 6,20 ----
   *  This program is free software; you can redistribute it and/or
   *  modify it under the terms of the GNU General Public License
   *  as published by the Free Software Foundation; either version
   *  2 of the License, or (at your option) any later version.
   */
+ 
+ /*
+  * Copyright (c) 2018, Joyent, Inc.
+  */
+ 
  #include <errno.h>
  #include <unistd.h>
  #include <fcntl.h>
  #include <sys/wait.h>
  #include <syslog.h>
*** 68,78 ****
          (void) seteuid(getuid());
          (void) setegid(getgid());
          argv[0] = promptprog;
          argv[1] = user == NULL ? "" : user;
          argv[2] = remote_name;
!         slprintf(fdstr, sizeof (fdstr), "%d", p[1]);
          argv[3] = fdstr;
          argv[4] = NULL;
          (void) execv(*argv, argv);
          _exit(127);
      }
--- 73,83 ----
          (void) seteuid(getuid());
          (void) setegid(getgid());
          argv[0] = promptprog;
          argv[1] = user == NULL ? "" : user;
          argv[2] = remote_name;
!         (void) slprintf(fdstr, sizeof (fdstr), "%d", p[1]);
          argv[3] = fdstr;
          argv[4] = NULL;
          (void) execv(*argv, argv);
          _exit(127);
      }