Replace another instance of svn_wc_prop_list().
Replace another instance of svn_wc_prop_list().

* subversion/libsvn_client/blame.c
  (svn_client_blame5): Create and use a context to get property lists.

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