PVS-Studio warning V523 for OpenMS

template <typename MapType>
void MzMLHandler<MapType>::characters(
  const XMLCh* const chars, const XMLSize_t)
{
  ....
  if (optionalAttributeAsString_(data_processing_ref,
                                 attributes,
                                 s_data_processing_ref))
  {
    data_.back().meta.setDataProcessing(
                        processing_[data_processing_ref]);
  }
  else
  {
    data_.back().meta.setDataProcessing(
                        processing_[data_processing_ref]);
  }
  ....
}

Most likely this is what should be written here: processing_[data_processing_ref] ... processing_[default_processing_]

This suspicious code was found in OpenMS project by PVS-Studio static code analyzer.
Warning message is:
V523 The 'then' statement is equivalent to the 'else' statement. mzmlhandler.h 534

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