Default ctor was leaving pointers uninitialized which was dangerous, so merge it with the other ctor to ensure that we always set them to NULL. Also make m_response const as it can't be changed after creating the event.
Default ctor was leaving pointers uninitialized which was dangerous, so merge it with the other ctor to ensure that we always set them to NULL. Also make m_response const as it can't be changed after creating the event.