Where is the error

Hi
  I have the following function:

CREATE OR REPLACE FUNCTION "int" (boolean) RETURNS integer AS'
select CASE WHEN $1 THEN 1
ELSE 0
END
'LANGUAGE 'sql';

When I try to use it:

select int('t'::bool);
ERROR:  syntax error at or near "(" at character 11

I am using PG8.0b1

Thank you.

      Kaloyan