Change handle creation to use Object*, to comply with strict aliasing rules.

src/api.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 398 matching lines @@
   }
 }
 
 
 int HandleScope::NumberOfHandles() {
   return i::HandleScope::NumberOfHandles();
 }
 
 
 void** v8::HandleScope::CreateHandle(void* value) {
-  return i::HandleScope::CreateHandle(value);
+  return reinterpret_cast<void**>(
+      i::HandleScope::CreateHandle(reinterpret_cast<i::Object*>(value)));
 }
 
 
 void Context::Enter() {
   if (IsDeadCheck("v8::Context::Enter()")) return;
   ENTER_V8;
   i::Handle<i::Context> env = Utils::OpenHandle(this);
   thread_local.EnterContext(env);
 
   thread_local.SaveContext(i::GlobalHandles::Create(i::Top::context()));
@@ skipping 3058 matching lines @@
       reinterpret_cast<HandleScopeImplementer*>(storage);
   List<void**>* blocks_of_archived_thread = thread_local->Blocks();
   v8::ImplementationUtilities::HandleScopeData* handle_data_of_archived_thread =
       &thread_local->handle_scope_data_;
   Iterate(v, blocks_of_archived_thread, handle_data_of_archived_thread);
 
   return storage + ArchiveSpacePerThread();
 }
 
 } }  // namespace v8::internal