message: POS: Only call cleanup if it isn't null
diff: @@ -125,7 +125,7 @@ PerObjectStorage::ObjectStorage::~ObjectStorage()
  for (auto it: *m_PointerMap)
  {
  auto ptr = it.second.first;
  - auto cleanup = it.second.second;
  + if (auto cleanup = it.second.second)
  cleanup(ptr);
  }
  }
  