message: Make CanFlushToDisk a const member function
diff: @@ -538,7 +538,7 @@ public:
  //! @returns whether or not the CoinsViews object has been fully initialized and we can
  //! safely flush this object to disk.
  - bool CanFlushToDisk() EXCLUSIVE_LOCKS_REQUIRED(cs_main) {
  + bool CanFlushToDisk() const EXCLUSIVE_LOCKS_REQUIRED(cs_main) {
  return m_coins_views && m_coins_views->m_cacheview;
  }
  