implicit cast works for insert, not for select

I am migrating a DB from SQL Server to Postgres 9.2.7 on Centos 7, via
regex converting the SQL Server DDL to a Postgres DDL. Both DB's need
to be supported in the near term.

The biggest problem has been the tiny int boolean that SQL Server
uses, which I can get to work for postgres inserts by:

atdev=# update pg_cast set castcontext = 'a' where castsource =
'int'::regtype and casttarget = 'bool'::regtype;

atdev=# create table foo (f1 bool);
CREATE TABLE
atdev=# insert into foo values(1);
INSERT 0 1

That allows me to apply the DDL and all is well, until I do this
select (auto generated by hibernate) :

atdev=# select atsettings0_.atSettingsID as atSettin1_12_,
atsettings0_.OBJ_VERSION as OBJ2_12_, atsettings0_.name as name12_,
atsettings0_.value as value12_, atsettings0_.description as
descript5_12_, atsettings0_.enabled as enabled12_,
atsettings0_.deleted as deleted12_ from ATSettings atsettings0_ where
(atsettings0_."deleted" = 0 OR atsettings0_."deleted" IS NULL ) and
atsettings0_.atSettingsID=1;
ERROR: operator does not exist: boolean = integer
LINE 1: ...ttings atsettings0_ where (atsettings0_."deleted" = 0 OR ats...
^
HINT: No operator matches the given name and argument type(s). You
might need to add explicit type casts.

If I quote the zero as:

= '0'

Then that would work, but since this 'deleted' column is a boolean
type for a hibernate generated query that works fine in SQL Server, I
would really like some type of cast here to make the above select work
as is. Any ideas?