[PATCH] Alter table xxx CHARACTER SET utf8, CONVERT TO CHARACTER SET latin1 should fail

Both these terms set the default_table_charset attribute internally so whenever used they should be the same value.

Alter table xxx CONVERT TO CHARACTER SET latin1, CHARACTER SET utf8 has protection mechanism that result in an error.

However Alter table xxx CHARACTER SET utf8, CONVERT TO CHARACTER SET latin1 will ignore the utf8 and just use the latin1 for the default charset and conversion.

How to repeat:
Alter table xxx CHARACTER SET utf8, CONVERT TO CHARACTER SET latin1

on any table.

The resting table will have DEFAULT CHARSET=latin1

Attached patch causes and error consistent with Alter table xxx CONVERT TO CHARACTER SET latin1, CHARACTER SET utf8