PVS-Studio warning V547 for TPP

void SpectraSTReplicates::aggregateStats(....)
{
  ...
  unsigned int numAssignedPeaks =
    (*r)->entry->getPeakList()->getNumAssignedPeaks();
  if (numAssignedPeaks >= 0)
  {
    sumFracAssigned +=
      (double)numAssignedPeaks / (double)numPeaks;
    numAnnotated++;
  }
  ...
}

This suspicious code was found in TPP project by PVS-Studio static code analyzer.
Warning message is:
V547 Expression 'numAssignedPeaks >= 0' is always true. Unsigned type value is always >= 0. tpplib spectrastreplicates.cpp 642

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