rem: problems++;
add: ok = false;
context: print_user (uid_t uid){  struct passwd *pwd = NULL;  if (use_name)    {      pwd = getpwuid (uid);      if (pwd == NULL)	{	  error (0, 0, _("cannot find name for user ID %u"), uid);	  problems++;	}    }  if (pwd == NULL)    printf ("%u", (unsigned) uid);  else    printf ("%s", pwd->pw_name);}