ConstDict layout should be public.

Author: braxtonmckee

typed_python/ConstDictType.hpp

@@ -27,6 +27,7 @@ PyDoc_STRVAR(ConstDictType_doc,
     );
 
 class ConstDictType : public Type {
+public:
     class layout {
     public:
         std::atomic<int64_t> refcount;
@@ -39,8 +40,6 @@ class ConstDictType : public Type {
 
     typedef layout* layout_ptr;
 
-public:
-
     ConstDictType(Type* key, Type* value) :
             Type(TypeCategory::catConstDict),
             m_key(key),