Cast NULL to (char *) in vararg calls to svn_dirent_join_many
and svn_path_join_many.

* subversion/libsvn_fs_fs/lock.c
  (digest_path_from_digest, digest_path_from_path): here

* subversion/libsvn_fs_fs/transaction.c
  (create_txn_dir, create_txn_dir_pre_1_5): here
 
* subversion/libsvn_fs_fs/util.c
  (svn_fs_fs__path_rev_packed, svn_fs_fs__path_rev_shard,
   svn_fs_fs__path_rev, svn_fs_fs__path_revprops_shard,
   svn_fs_fs__path_revprops_pack_shard, svn_fs_fs__path_revprops,
   svn_fs_fs__path_txn_dir, svn_fs_fs__path_txn_proto_rev,
   svn_fs_fs__path_txn_proto_rev_lock, svn_fs_fs__path_node_origin): here

* subversion/libsvn_fs_x/lock.c
  (digest_path_from_digest, digest_path_from_path): here
 
* subversion/libsvn_fs_x/transaction.c
  (create_txn_dir): here

* subversion/libsvn_fs_x/util.c
  (svn_fs_x__path_rev_packed, svn_fs_x__path_rev_shard,
   svn_fs_x__path_revprops_shard,
   svn_fs_x__path_revprops_pack_shard,
   svn_fs_x__path_txn_dir, svn_fs_x__path_txn_proto_rev,
   svn_fs_x__path_txn_proto_rev_lock, svn_fs_x__path_node_origin): here
 
* subversion/libsvn_subr/config_file.c
  (svn_config__sys_config_path, svn_config_get_user_config_path): here
 
* subversion/libsvn_wc/adm_files.c
  (svn_wc__adm_child): here
 
* subversion/libsvn_wc/upgrade.c
  (build_lockfile_path, bump_to_29): here
 
* subversion/libsvn_wc/wc_db.c
  (svn_wc__db_temp_wcroot_tempdir): here
 
* subversion/libsvn_wc/wc_db_pristine.c
  (get_pristine_fname): here
 
* subversion/mod_authz_svn/mod_authz_svn.c
  (get_access_conf): here

* subversion/tests/cmdline/entries-dump.c
  (entries_dump): here

* subversion/tests/libsvn_client/client-test.c
  (test_patch): here
 
* subversion/tests/libsvn_fs_fs/fs-fs-pack-test.c
  (pack_filesystem, pack_even_filesystem, recover_fully_packed): here

* subversion/tests/libsvn_fs_x/fs-x-pack-test.c
  (pack_filesystem, pack_even_filesystem, recover_fully_packed): here

* subversion/tests/libsvn_subr/dirent_uri-test.c
  (test_dirent_join): here

* subversion/tests/libsvn_subr/path-test.c
  (test_path_join): here
 
* subversion/tests/libsvn_wc/entries-compat.c
  (test_entries_alloc, test_stubs): here


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1535399 13f79535-47bb-0310-9956-ffa450edef68