PVS-Studio warning V595 for OpenDDS

void
DataReaderImpl::cleanup()
{
  ....
  if (owner_manager_) {
    owner_manager_->unregister_reader(
      topic_servant_->type_name(), this);
  }
  if (topic_servant_) {
  ....
}

This suspicious code was found in OpenDDS project by PVS-Studio static code analyzer.
Warning message is:
V595 The 'topic_servant_' pointer was utilized before it was verified against nullptr. Check lines: 164, 168. datareaderimpl.cpp 164

PVS-Studio is a static analyzer for detecting bugs in the source code of applications written in C, C++, C++11, C++/CX. Site: http://www.viva64.com/en/pvs-studio/