Added a test case for bug #11285.
sql_select.cc:
  Fixed bug #11285.
  The problem occurred with Item_equal in an 'on expression'
  that was evaluated to false.


sql/sql_select.cc:
  Fixed bug #11285.
  The problem occurred with Item_equal in an 'on expression'
  that was evaluated to false.
mysql-test/t/join_outer.test:
  Added a test case for bug #11285.
mysql-test/r/join_outer.result:
  Added a test case for bug #11285.