Dan Fandrich fixed another memory leak, this time in the OpenSSL interface

code:

It's not clear to me whether all the BN_news in _libssh2_rsa_new need to
be cleaned up, too.  The OpenSSL docs for RSA_free implies that you don't
need to, and valgrind doesn't complain, so it's probably OK as is.

src/openssl.c

@@ -157,6 +157,8 @@ int _libssh2_dsa_sha1_verify(libssh2_dsa_ctx *dsactx,
 
 	libssh2_sha1(m, m_len, hash);
 	ret = DSA_do_verify(hash, SHA_DIGEST_LENGTH, &dsasig, dsactx);
+	BN_clear_free(dsasig.s);
+	BN_clear_free(dsasig.r);
 
 	return (ret == 1) ? 0 : -1;
 }