missing spinBits in 2009 data

Fig 1. Run bXing & spin bits for L2W triggered events in run 10079030 . bXing distribution looks fine, but spin4 from L0-trigger data is corrupted.

  StL0Trigger *trig=&(muEve->l0Trigger());
  int bx48=trig->bunchCrossingId();
  int bx7=trig->bunchCrossingId7bit(runNo);
  int spin4=trig->spinBits(runNo);