Add a lot of missing Py_INCREF
diff --git a/OpenSSL/crypto/revoked.c b/OpenSSL/crypto/revoked.c
index e9b1297..93f9946 100644
--- a/OpenSSL/crypto/revoked.c
+++ b/OpenSSL/crypto/revoked.c
@@ -434,6 +434,9 @@
         return 0;
     }
 
+    /* PyModule_AddObject steals a reference.
+     */
+    Py_INCREF((PyObject *)&crypto_Revoked_Type);
     if (PyModule_AddObject(module, "Revoked", (PyObject *)&crypto_Revoked_Type) != 0) {
         return 0;
     }