Merge mysql.com:/M50/testbugs-5.0 into mysql.com:/M51/clone-5.1

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# BUG 12207 alter table ... discard table space on MyISAM table causes ERROR 2013 (HY000)

#

# Some platforms (Mac OS X, Windows) will send the error message using small letters.

CREATE TABLE T12207(a int) ENGINE=MYISAM;

--replace_result t12207 T12207

--error 1031

ALTER TABLE T12207 DISCARD TABLESPACE;

DROP TABLE T12207;