Incorrect results in less-than comparison between INT4 and INTT

Less-than comparisons < between INT4 and INTT give wrong results.

SELECT 4::INT4 < 5::INTT AS result;

┌────────┐
│ result │
├────────┤
│ t      │
└────────┘
(1 row)

┌────────┐
│ result │
├────────┤
│ f      │
└────────┘
(1 row)

Check the int32_intt_lt function in intt.c for errors.