bug fixed (sometimes it broke filesort, due to too late maybe_null=1)

.bzrignore

@@ -287,3 +287,5 @@ support-files/mysql.server
 support-files/mysql.spec
 tags
 tmp/*
+myisam/test1.MYD
+myisam/test1.MYI

BitKeeper/etc/logging_ok

@@ -8,3 +8,4 @@ mwagner@evoq.mwagner.org
 paul@central.snake.net
 paul@teton.kitebird.com
 sasha@mysql.sashanet.com
+serg@serg.mysql.com

sql/item_func.cc

@@ -1951,6 +1951,9 @@ bool Item_func_match::fix_fields(THD *thd,struct st_table_list *tlist)
   List_iterator<Item> li(fields);
   Item *item;
 
+  maybe_null=1;
+  join_key=0;
+
   /* Why testing for const_item ? Monty */
   /* I'll remove it later, but this should include modifications to
      find_best and auto_close as complement to auto_init code above. SerG */
@@ -2044,8 +2047,6 @@ bool Item_func_match::fix_index()
       continue;
 
     this->key=ft_to_key[key];
-    maybe_null=1;
-    join_key=0;
 
     return 0;
   }