message: fix protection
diff: @@ -107,7 +107,7 @@ void RopeDipole::propagateInit(double deltat) {
  double mTc2 = pcm.pT2() + pcm.m2Calc();
  double mTa2 = pam.pT2() + pam.m2Calc();
  - if (mTc2 <= 0 || mTc2 <= 0) {
  + if (mTc2 <= 0 || mTa2 <= 0) {
  infoPtr->errorMsg("Error in RopeDipole::propagateInit: Tried to"
  "propagate a RopeDipoleEnd with mT2 <= 0");
  return;
  