Made keybuff_size longlong (To make show variables work similar on 32
and 64 bit systems)
Fixed some 'not initalized variable errors' in multi-table-update.
Fixed memory leak in multi-table-update.
Now all tests works under valgrind without any errors.


libmysqld/lib_sql.cc:
  Copy arguments given to mysql_server_init()
mysql-test/r/temp_table.result:
  Update test results (after merge form 3.23)
sql/handler.cc:
  Made keybuff_size longlong
sql/mysql_priv.h:
  Made keybuff_size longlong
sql/mysqld.cc:
  Made keybuff_size longlong
sql/set_var.cc:
  Made keybuff_size longlong
sql/set_var.h:
  Made keybuff_size longlong
sql/sql_select.cc:
  Simple cleanup
sql/sql_select.h:
  Make TMP_TABLE_PARAM to be allocated through Sql_alloc
sql/sql_update.cc:
  Fixed some 'not initalized variable errors' in multi-table-update.
  Fixed memory leak in multi-table-update