fix the crash bug when specifying non-existed option.

vpd.c

 /*
  * Copyright (C) 2010 Google Inc.
  *
  * 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 547 matching lines @@
   const char *optstring = "hf:E:s:p:i:lO";
   static struct option long_options[] = {
     {"help", 0, 0, 'h'},
     {"file", 0, 0, 'f'},
     {"epsbase", 0, 0, 'E'},
     {"string", 0, 0, 's'},
     {"pad", 0, 0, 'p'},
     {"partition", 0, 0, 'i'},
     {"list", 0, 0, 'l'},
     {"overwrite", 0, 0, 'O'},
+    {0, 0, 0, 0}
   };
   char *filename = NULL;
   int write_back_to_flash = 0;
   int list_it = 0;
   int overwrite_it = 0;
   int modified = 0;
   int fd;
 
   initContainer(&file);
   initContainer(&argument);
@@ skipping 135 matching lines @@
   }
 
 teardown:
   if (spd_data) free(spd_data);
   if (filename) free(filename);
   destroyContainer(&file);
   destroyContainer(&argument);
 
   return retval;
 }