causes ERROR 2013).
(all-in-one approved patch)


mysql-test/r/alter_table.result:
  result for test for bug #12207
  (alter table discard database works on mysiam and causes error 2013)
mysql-test/t/alter_table.test:
  test for bug #12207 (alter table discard tablescpae on MyISAM table
  causes ERROR 2013)
sql/sql_table.cc:
  send all error message to table->file->print_error() thus not missing
  handing of some (like engine not supported).
  
  fix for bug #12207 (alter table discard tablespace on MyISAM table
  causes ERROR 2013)