Fix another undefined shift.
Fix another undefined shift.

Note that `(1 << j)` is undefined for j == 31, so `(1u << j)` should be
used.

runn1ng/trezor-crypto,runn1ng/trezor-crypto,runn1ng/trezor-crypto,trezor/trezor-crypto,runn1ng/trezor-crypto,trezor/trezor-crypto,trezor/trezor-crypto,trezor/trezor-crypto,trezor/trezor-crypto,runn1ng/trezor-crypto