nacl/auth: use KeySize constant consistently.
Fixes golang/go#21788
Run-TryBot: Brad Fitzpatrick
TryBot-Result: Gobot Gobot
@@ -47,7 +47,7 @@ func Sum(m []byte, key *[KeySize]byte) *[Size]byte {
// Verify checks that digest is a valid authenticator of message m under the
// given secret key. Verify does not leak timing information.
-func Verify(digest []byte, m []byte, key *[32]byte) bool {
+func Verify(digest []byte, m []byte, key *[KeySize]byte) bool {
if len(digest) != Size {
return false
}
