Before the fix in ~Prepared_statments we got a memory leak when executing mysql_client_test.test
Note that test 'variables.test' fails.
This will be fixed when Jimw pushes the fix for Bug 10351


mysys/default.c:
  Fixed typo
sql/item.cc:
  More debugging information
sql/sql_prepare.cc:
  More debugging information
  Ensure we free all items for prepared statements
  Before the fix in ~Prepared_statments we got a memory leak when executing mysql_client_test.test