Fix type definitions, module init return values, and unicode/bytes conversions
diff --git a/OpenSSL/crypto/crl.c b/OpenSSL/crypto/crl.c
index c9abbab..83691fb 100644
--- a/OpenSSL/crypto/crl.c
+++ b/OpenSSL/crypto/crl.c
@@ -232,7 +232,7 @@
 }
 
 PyTypeObject crypto_CRL_Type = {
-    PyVarObject_HEAD_INIT(&PyType_Type, 0)
+    PyOpenSSL_HEAD_INIT(&PyType_Type, 0)
     "CRL",
     sizeof(crypto_CRLObj),
     0,