distinguishing public from secret keys with gpgme

[Hans-Christoph Steiner]

Hey all,

Using gpgme 1.4.1, I'm trying to pick out which keys in the keyring have the
secret component, and can be used for signing and decryption.  I've tried:

    return key->secret

and

    jboolean hasSecretKey = 0;
    gpgme_subkey_t subkey;
    for(subkey = key->subkeys; subkey; subkey = subkey->next)
        if (subkey->secret)
            return 1;
    return 0;

Both of these always turn up false for every key in the keyring.  `gpg2
--list-secret-keys` shows that I have one secret key.  What am I missing?

.hc