Fix for a bug with LEAST() in WHERE clause
ha_innodb.cc:
  Fix for a configure bug
multi_update.result, multi_update.test:
  Fix for the update with NULL's in the result set
sql_update.cc:
  Fix for the update with NULL's in the result set
   Fix for the update with NULL's in the result set
   Fix for the update with NULL's in the result set


sql/sql_update.cc:
  Fix for the update with NULL's in the result set
   Fix for the update with NULL's in the result set
   Fix for the update with NULL's in the result set
mysql-test/t/multi_update.test:
  Fix for the update with NULL's in the result set
mysql-test/r/multi_update.result:
  Fix for the update with NULL's in the result set
sql/ha_innodb.cc:
  Fix for a configure bug
sql/item_func.h:
  Fix for a bug with LEAST() in WHERE clause