Change a few sites where the Handle<T>(NULL) constructor is used so...

src/handles.cc

 // Copyright 2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 354 matching lines @@
   JSValue* wrapper = JSValue::cast(*cache);
   Proxy* proxy = Script::cast(wrapper->value())->wrapper();
   ASSERT(proxy->proxy() == reinterpret_cast<Address>(cache.location()));
   proxy->set_proxy(0);
   GlobalHandles::Destroy(cache.location());
   Counters::script_wrappers.Decrement();
 }
 
 
 Handle<JSValue> GetScriptWrapper(Handle<Script> script) {
-  Handle<Object> cache(reinterpret_cast<Object**>(script->wrapper()->proxy()));
-  if (!cache.is_null()) {
+  if (script->wrapper()->proxy() != NULL) {
     // Return the script wrapper directly from the cache.
-    return Handle<JSValue>(JSValue::cast(*cache));
+    return Handle<JSValue>(
+        reinterpret_cast<JSValue**>(script->wrapper()->proxy()));
   }
 
   // Construct a new script wrapper.
   Counters::script_wrappers.Increment();
   Handle<JSFunction> constructor = Top::script_function();
   Handle<JSValue> result =
       Handle<JSValue>::cast(Factory::NewJSObject(constructor));
   result->set_value(*script);
 
   // Create a new weak global handle and use it to cache the wrapper
@@ skipping 352 matching lines @@
   Handle<Map> new_map = Factory::CopyMapDropTransitions(old_map);
   obj->set_map(*new_map);
   new_map->set_needs_loading(true);
   // Store the lazy loading info in the constructor field.  We'll
   // reestablish the constructor from the fixed array after loading.
   new_map->set_constructor(*arr);
   ASSERT(!obj->IsLoaded());
 }
 
 } }  // namespace v8::internal