Fixed typo in Align_track decl.
Fixed typo in Align_track decl.

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