Insert SHRT_MIN fails for int2 column

When inserting SHRT_MIN into an int2 column, the odbc driver comes up
with the following SQL:

insert into dbc_test ( i16 ) values ( -32768::int2    );

This fails with an out of range error, and should be either:

insert into dbc_test ( i16 ) values ( (-32768)::int2    );

Or have the ::int2 cast removed altogether.

The ::int2 cast is added in convert.c on line 3024 (for 08.00.0005)
preceded by a comment stating it is necessary:

    /* needs cast because there is no automatic downcast from
        int4 constants */
    CVT_APPEND_STR(qb, "::int2");

Is this really necessary?  On my 7.4.2 database, the following works
just fine:

create table tst ( i16 int2 );
insert into tst ( i16 ) values ( -32768 );
insert into tst ( i16 ) values ( 32767 );


-Kelly