Fix bug that was revealed by arm cross-compilation.

tpmd/unix/tpmd.c

 /* Software-based Trusted Platform Module (TPM) Emulator
  * Copyright (C) 2004-2010 Mario Strasser <mast@gmx.net>
  *
  * 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.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 153 matching lines @@
     printf("  u : unix socket name to use (default: %s)\n", opt_socket_name);
     printf("  o : effective user the application should run as\n");
     printf("  g : effective group the application should run as\n");
     printf("  h : print this help message\n");
     printf("  startup mode : must be 'clear', "
            "'save' (default) or 'deactivated\n");
 }
 
 static void parse_options(int argc, char **argv)
 {
-    char c;
+    int c;
     struct passwd *pwd;
     struct group *grp;
     opt_uid = getuid();
     opt_gid = getgid();
     info("parsing options");
     while ((c = getopt (argc, argv, "dfs:u:o:g:c:h")) != -1) {
         debug("handling option '-%c'", c);
         switch (c) {
             case 'd':
                 opt_debug = 1;
@@ skipping 302 matching lines @@
     if (!opt_foreground) daemonize();
     /* open random device */
     init_random();
     /* start main processing loop */
     main_loop();
     info("stopping TPM Emulator daemon");
     close(rand_fh);
     closelog();
     return EXIT_SUCCESS;
 }