Not fixed in 4.1 as not critical. Also I'm correcting error checking of multi-UPDATE/DELETE
when it comes to binlogging, to make it consistent with when we rollback the statement.


mysql-test/r/rpl_multi_delete.result:
  result update
mysql-test/r/rpl_multi_update.result:
  result update
mysql-test/t/rpl_multi_delete.test:
  test for BUG#13348
mysql-test/t/rpl_multi_update.test:
  test of BUG#13348
sql/sql_delete.cc:
  We now binlog multi-DELETE even if no row was updated (like we do for DELETE).
  I'm also correcting some error checking (< instead of <=), basing myself on when we rollback.
sql/sql_update.cc:
  we now binlog multi-UPDATE even if no row was updated (like we do for UPDATE).
  Adding to existing tests to test new behaviour.
  I'm also correcting some error checking (< instead of <=), basing myself on when we rollback.