Simplify two mergeinfo functions.
Simplify two mergeinfo functions.

* subversion/libsvn_subr/mergeinfo.c
  (svn_mergeinfo_inheritable): Replace the body with a call to
    svn_mergeinfo_inheritable2().
  (svn_mergeinfo__filter_mergeinfo_by_ranges): Simplify logic by calling an
    internal function.

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