SWIG python: fix scriptpubkey_to_address

Author: LeoComandini

src/swig_python/contrib/address.py

@@ -18,6 +18,7 @@ def test_b58_address(self):
             ('H5nswXhfo8AMt159sgA5FWT35De34hVR4o', h2b('a914f80278b2011573a2ac59c83fadf929b0fc57ad0187'), WALLY_NETWORK_LIQUID),
         ]:
             self.assertEqual(address_to_scriptpubkey(address, network), scriptpubkey)
+            self.assertEqual(scriptpubkey_to_address(scriptpubkey, network), address)
 
 if __name__ == '__main__':
     unittest.main()

src/swig_python/swig.i

@@ -207,6 +207,7 @@ static void destroy_words(PyObject *obj) { (void)obj; }
 %pybuffer_nullable_binary(const unsigned char *pub_key, size_t pub_key_len);
 %pybuffer_nonnull_binary(const unsigned char *salt, size_t salt_len);
 %pybuffer_nullable_binary(const unsigned char *script, size_t script_len);
+%pybuffer_nullable_binary(const unsigned char *scriptpubkey, size_t scriptpubkey_len);
 %pybuffer_nonnull_binary(const unsigned char *sig, size_t sig_len);
 %pybuffer_nonnull_binary(const unsigned char *sighash, size_t sighash_len);
 %pybuffer_nonnull_binary(const unsigned char *txhash, size_t txhash_len);