emv_pk: fix emv_pk_verify
emv_pk: fix emv_pk_verify

Fix possible memory leak. Also use crypto_hash_get_size() instead of
hardcoding SHA-1 hash size.

Signed-off-by: Dmitry Eremin-Solenikov <b6edad08270b2e4ffbcb0879e25a0e29a48c5275@gmail.com>

lumag/emv-tools