Fix a pool lifetime bug in, of all places, a function meant to help with that problem.
Fix a pool lifetime bug in, of all places, a function meant to help
with that problem.

* subversion/libsvn_subr/mergeinfo.c
  (svn_mergeinfo_dup): Duplicate the hash keys into the new pool, too.
  (svn_rangelist_dup): Use svn_merge_range_dup() instead of
    duplicating that logic in this function's loop.

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