message: Fix an issue in Vector::Norml2.
diff: @@ -693,7 +693,7 @@ double Vector::Norml2() const
  if (scale <= absdata)
  {
  const double sqr_arg = scale / absdata;
  - sum = 1.0 + (sqr_arg * sqr_arg);
  + sum = 1.0 + sum * (sqr_arg * sqr_arg);
  scale = absdata;
  continue;
  } // end if scale <= absdata
  