Fix type definitions, module init return values, and unicode/bytes conversions
diff --git a/OpenSSL/crypto/x509store.c b/OpenSSL/crypto/x509store.c
index 1452df6..30ae508 100644
--- a/OpenSSL/crypto/x509store.c
+++ b/OpenSSL/crypto/x509store.c
@@ -93,7 +93,7 @@
 
 
 PyTypeObject crypto_X509Store_Type = {
-    PyVarObject_HEAD_INIT(&PyType_Type, 0)
+    PyOpenSSL_HEAD_INIT(&PyType_Type, 0)
     "X509Store",
     sizeof(crypto_X509StoreObj),
     0,