cipher:kyber: Apply a change from upstream.
* cipher/kyber-kdep.c (crypto_kem_dec): Fix the buffer size.
Cherry-picked from master commit of:
bdc3724d721dfd65fdd8cad311855461f9a101c1
Manually apply upstream main commit in of:
4768bd37c02f9c40a46cb49d4d1f4d5e612bb882
- Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>