Cannot create view with subquery and join clause

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                         POSTGRESQL BUG REPORT TEMPLATE
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Your name        :    Robert Osowiecki
Your email address    :    robson@cavern.pl


System Configuration
---------------------
   Architecture: Intel Celeron

   Operating System : Linux version 2.4.16

   PostgreSQL version :   PostgreSQL-7.3

   Compiler used : egcs-2.91.66


Please enter a FULL description of your problem:
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I cannot create a view with subquery and join clase.



Please describe a way to repeat the problem.   Please try to provide a
concise reproducible example, if at all possible:
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/** this one works OK */

create view VOrderTest as
select
or_order_nr,

(select sum(sp_qty)
     from TOrdSpecif
     where sp_or_order_nr=or_order_nr)
as or_order_qty
from TOrder;

/** this one fails with
   ERROR:  find_expr_references_walker: bogus varno 3
*//

create view VOrderTest1 as
select
or_order_nr,

(select sum(sp_qty)
     from TOrdSpecif
     where sp_or_order_nr=or_order_nr)
as or_order_qty

from TOrder
join TCategory on (true);


If you know how this problem might be fixed, list the solution below:
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I've looked at find_expr_references_walker source, but it's all voodoo
to me :-(