fix eternal casts

include/v8.h

Index: include/v8.h
diff --git a/include/v8.h b/include/v8.h
index 9ba928bd88fd3913ddb3cb61b2cf2f5f67d0e03e..cfc1de63bf2c0bda91496091615a8692cfab887d 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -5578,13 +5578,13 @@ template<class T>
 template<class S>
 void Eternal<T>::Set(Isolate* isolate, Local<S> handle) {
   TYPE_CHECK(T, S);
-  V8::Eternalize(isolate, Value::Cast(*handle), &this->index_);
+  V8::Eternalize(isolate, reinterpret_cast<Value*>(*handle), &this->index_);
 }
 
 
 template<class T>
 Local<T> Eternal<T>::Get(Isolate* isolate) {
-  return Local<T>::Cast(V8::GetEternal(isolate, index_));
+  return Local<T>(reinterpret_cast<T*>(*V8::GetEternal(isolate, index_)));
 }