Fix a number of compiler warnings in the FSFS reorg tool.
Fix a number of compiler warnings in the FSFS reorg tool.

* tools/fsfs/reorg.c
  (get_cached_dir,
   set_cached_dir, 
   get_cached_window, 
   set_cached_window): don't use identifier "index" (hides global def)
  (read_pack_file,
   update_id): ensure that variables are properly initialized

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion