PVS-Studio warning V557 for Source SDK

#define MAX_WEAPON_SLOTS    6  // hud item selection slots

void CHudWeaponSelection::Paint()
{
  ....
  int xModifiers[] = { 0, 1, 0, -1 };
  int yModifiers[] = { -1, 0, 1, 0 };

  for ( int i = 0; i < MAX_WEAPON_SLOTS; ++i )
  {
    ....
    xPos += ( m_flMediumBoxWide + 5 ) * xModifiers[ i ];
    yPos += ( m_flMediumBoxTall + 5 ) * yModifiers[ i ];
  ....
}

This suspicious code was found in Source SDK project by PVS-Studio static code analyzer.
Warning message is:
V557 Array overrun is possible. The value of 'i' index could reach 5. Client (HL2) hud_weaponselection.cpp 632

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