mysql-test/r/fulltext.result:
  test added
mysql-test/t/fulltext.test:
  test added
sql/item_func.cc:
  fulltext+const_table problem fixed once and forever
sql/item_func.h:
  fulltext+const_table problem fixed once and forever
sql/sql_select.cc:
  fulltext+const_table problem fixed once and forever
sql/table.h:
  fulltext+const_table problem fixed once and forever