Simplify FSFS implementation of svn_fs_get_mergeinfo(include_descendents=TRUE) by de-generifying a crawler.  This crawler used to take an "action" callback, but now there's only one action, so let's just do it inline.
Simplify FSFS implementation of
svn_fs_get_mergeinfo(include_descendents=TRUE) by de-generifying a
crawler.  This crawler used to take an "action" callback, but now
there's only one action, so let's just do it inline.

* subversion/libsvn_fs_fs/tree.c
  (crawler_action_t, add_descendant_mergeinfo_action): Remove.
  (crawl_directory_dag_for_mergeinfo): Just do what
   add_descendant_mergeinfo_action used to do inline instead of taking
   an action argument.
  (add_descendant_mergeinfo): Adjust.

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