fixed mistyping (BUG #699)

sql/sql_select.cc

@@ -1227,7 +1227,7 @@ JOIN::exec()
     {
       // Some tables may have been const
       curr_join->tmp_having->update_used_tables();
-      JOIN_TAB *table= &curr_join->join_tab[const_tables];
+      JOIN_TAB *table= &curr_join->join_tab[curr_join->const_tables];
       table_map used_tables= curr_join->const_table_map | table->table->map;
 
       Item* sort_table_cond= make_cond_for_table(curr_join->tmp_having,
@@ -1263,7 +1263,7 @@ JOIN::exec()
 	  We can abort sorting after thd->select_limit rows if we there is no
 	  WHERE clause for any tables after the sorted one.
 	*/
-	JOIN_TAB *table= &curr_join->join_tab[const_tables+1];
+	JOIN_TAB *table= &curr_join->join_tab[curr_join->const_tables+1];
 	JOIN_TAB *end_table= &curr_join->join_tab[tables];
 	for (; table < end_table ; table++)
 	{