16 instances where return value of OpenSSL i2d_RSAPublicKey is discarded -- might lead to use of uninitialized memory

The following functions rely on OpenSSL i2d_RSAPublicKey and do not heed its return value.

int crypto_pk_get_all_digests()
    tor-0.2.7.6/src/common/tortls.c:775
        if i2d_RSAPublicKey fails, cert->pkey_digests is all zeroes (cert was allocated with tor_malloc_zero)
int crypto_pk_get_digest()
    tor-0.2.7.6/src/or/connection_or.c:1686
        if i2d_RSAPublicKey fails, …