Fix compilation with strict aliasing enabled on GCC 4.4.1

Review URL: http://codereview.chromium.org/3166006

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@5239 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/handles-inl.h

@@ -47,7 +47,7 @@ template <class T>
 inline T* Handle<T>::operator*() const {
   ASSERT(location_ != NULL);
   ASSERT(reinterpret_cast<Address>(*location_) != kHandleZapValue);
-  return *location_;
+  return *BitCast<T**>(location_);
 }