fix eternal casts

R=svenpanne@chromium.org
BUG=

Review URL: https://codereview.chromium.org/23532017

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16442 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

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_)));
 }