PVS-Studio warning V803 for Geant4

class G4PhysicsTable : public std::vector<G4PhysicsVector*> {
  ....
};

typedef G4PhysicsTable::iterator G4PhysicsTableIterator;

inline void G4PhysicsTable::insertAt(
  size_t idx, G4PhysicsVector* pvec)
{
  G4PhysicsTableIterator itr=begin();
  for (size_t i=0; i<idx; ++i) { itr++; }
  ....
}

This suspicious code was found in Geant4 project by PVS-Studio static code analyzer.
Warning message is:
V803 Decreased performance. In case 'itr' is iterator it's more effective to use prefix form of increment. Replace iterator++ with ++iterator. g4physicstable.icc 83

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/