Final multipole bal calculation fix.
Final multipole bal calculation fix.

dpellegr/sixtracklib,hussainmkj/sixtracklib,dpellegr/sixtracklib,dpellegr/sixtracklib,SixTrack/SixTrackLib,SixTrack/SixTrackLib,SixTrack/SixTrackLib,hussainmkj/sixtracklib,SixTrack/SixTrackLib