PVS-Studio warning V555 for TPP

size_type size() const;

void computeDegenWts()
{
  ....
  int have_cluster = 0;
  ....
  if ( have_cluster > 0 && ppw_ref.size() - have_cluster > 0 )
  ....
}

This suspicious code was found in TPP project by PVS-Studio static code analyzer.
Warning message is:
V555 The expression 'ppw_ref.size() - have_cluster > 0' will work as 'ppw_ref.size() != have_cluster'. proteinprophet.cpp 6767

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