When using CREATE TEMPORARY TABLE LIKE to create a temporary table, 
or using TRUNCATE to delete all rows of a temporary table, they 
did not set the tmp_table_used flag, and cause the omission of
"SET @@session.pseudo_thread_id" when dumping binlog with mysqlbinlog,
and cause error when replay the statements.
      
This patch fixed the problem by setting tmp_table_used in these two
cases. (Done by He Zhenxing 2009-01-12)