Follow up r33342: Make svn_dirent_is_child and  svn_uri_is_child support a NULL pool, as svn_path_is_child does.
Follow up r33342: Make svn_dirent_is_child and 
svn_uri_is_child support a NULL pool, as svn_path_is_child does.

* subversion/libsvn_subr/dirent_uri.c
  (is_child): If pool is NULL, return the remainder part directly without
   duplicating.

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