On the fsfs-format7 branch: Fix various compiler warnings.

* subversion/libsvn_fs_fs/changes.c
  (): add missing #include

* subversion/libsvn_fs_fs/fs_fs.c
  (compare_l2p_to_p2l_index): mark non-public functions as static
  (compare_p2l_to_l2p_index,
   verify_rep_cache,
   verify_index_consistency): mark non-public functions as static;
                              remove unused variable
  (svn_fs_fs__verify): remove unused variable

* subversion/libsvn_fs_fs/index.c
  (get_p2l_keys,
   p2l_entry_lookup_func): mark non-public functions as static

* subversion/libsvn_fs_fs/noderevs.c
  (): add missing #include
  (store_id): use properly nested initializer
  (svn_fs_fs__noderevs_add): remove unused variable
  (write_reps): cast unsigned -> signed char strings

* subversion/libsvn_fs_fs/pack.c
  (auto_pad_block,
   copy_items_from_temp,
   write_changes_containers): remove unused variable

* subversion/libsvn_fs_fs/string_table.c
  (svn_fs_fs__string_table_get_func): no mixed declarations

* subversion/libsvn_subr/cache-membuffer.c
  (membuffer_cache_set_partial_internal): remove unused variable


git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/fsfs-format7@1478055 13f79535-47bb-0310-9956-ffa450edef68