python/sixtracklib: fixes mis-named C99 function call (introduced by too greedy copy&paste refactoring earlier)
python/sixtracklib: fixes mis-named C99 function call (introduced by too greedy copy&paste refactoring earlier)

SixTrack/SixTrackLib,SixTrack/SixTrackLib,SixTrack/SixTrackLib,SixTrack/SixTrackLib