Fix a crash in FSFS when accessing revprops and we are using 1.6-style caches
(option '-M 0').
Reported by: stsp
* subversion/libsvn_fs_fs/caching.c
(svn_fs_fs__initialize_caches):  All mandatory cache instances need to
provide parameters for 1.6-style caching.
@@ -519,7 +519,7 @@ svn_fs_fs__initialize_caches(svn_fs_t *fs,
SVN_ERR(create_cache(&(ffd->revprop_cache),
NULL,
membuffer,
- 0, 0, /* Do not use inprocess cache */
+ 8, 20, /* ~400 bytes / entry, capa for ~2 packs */
svn_fs_fs__serialize_revprops,
svn_fs_fs__deserialize_revprops,
sizeof(pair_cache_key_t),
