Remove some unnecessary svn_dirent_get_absolute() calls.
Remove some unnecessary svn_dirent_get_absolute() calls.

* subversion/libsvn_client/merge.c
  (filter_self_referential_mergeinfo): Require an absolute path argument
   rather than finding it.

  (merge_props_changed): Update call to filter_self_referential_mergeinfo().

  (update_wc_mergeinfo): Require and absolute path argument, rather than
   finding it -- all callers already passing an abs path.

  (remove_noop_subtree_ranges): Remove noop call to find the absolute path
   of an absolute path.

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