Add a lot of missing Py_INCREF
diff --git a/OpenSSL/crypto/crl.c b/OpenSSL/crypto/crl.c
index bc76f22..eec5bcb 100644
--- a/OpenSSL/crypto/crl.c
+++ b/OpenSSL/crypto/crl.c
@@ -276,12 +276,15 @@
 };
 
 int init_crypto_crl(PyObject *module) {
-       if (PyType_Ready(&crypto_CRL_Type) < 0) {
-                  return 0;
-       }
+    if (PyType_Ready(&crypto_CRL_Type) < 0) {
+        return 0;
+    }
 
-       if (PyModule_AddObject(module, "CRL", (PyObject *)&crypto_CRL_Type) != 0) {
-                  return 0;
-       }
-       return 1;
+    /* PyModule_AddObject steals a reference.
+     */
+    Py_INCREF((PyObject *)&crypto_CRL_Type);
+    if (PyModule_AddObject(module, "CRL", (PyObject *)&crypto_CRL_Type) != 0) {
+        return 0;
+    }
+    return 1;
 }