Explain analyze gives bogus varno for dblink views

Using the old < 7.3 version of dblink on 7.4devel gives a
"get_names_for_var: bogus varno 5" error.

Install the deprecated version of dblink by following the directions in
the dblink.sql file to comment / uncomment various parts of the script.

DROP TABLE t1;
CREATE TABLE t1 (a int);

DROP TABLE t2;
CREATE TABLE t2 (a int, b int);

INSERT INTO t1 (a) VALUES (1);

INSERT INTO t2 (a,b) VALUES (1,1);
INSERT INTO t2 (a,b) VALUES (1,2);

DROP VIEW v1;
CREATE VIEW v1 AS
SELECT dblink_tok(t1.dblink_p,0) as a
FROM (SELECT dblink('hostaddr=127.0.0.1 port=5740 dbname=dblink
user=jurka password=','SELECT a FROM t1') as dblink_p) AS t1;

DROP VIEW v2;
CREATE VIEW v2 AS
SELECT dblink_tok(t2.dblink_p,0) as a,dblink_tok(t2.dblink_p,1) as b
FROM (SELECT dblink('hostaddr=127.0.0.1 port=5740 dbname=dblink
user=jurka password=','SELECT a,b FROM t2') as dblink_p) AS t2;

SELECT * FROM t1,t2 WHERE t1.a=t2.a AND t1.a=1;

EXPLAIN ANALYZE
SELECT * FROM v1,v2 WHERE v1.a=v2.a AND v1.a=1;