[Rivet] bug in MC_PRINTEVENT

[Dmitry Kalinkin]

Hi,

The lines in the MC_PRINTEVENT.cc read:
      _pnames[23] = "W+";
      _pnames[-23] = "W-";
      _pnames[-24] = "Z0”;

This does not agree with http://pdg.lbl.gov/2007/reviews/montecarlorpp.pdf

Best,
Dmitry