fixed compiler warning without removing read_tpx ;-)
fixed compiler warning without removing read_tpx ;-)

junghans/csg,junghans/csg,junghans/csg,votca/csg,junghans/csg,junghans/csg,votca/csg,MrTheodor/csg,junghans/csg,votca/csg,votca/csg,MrTheodor/csg,MrTheodor/csg,MrTheodor/csg,MrTheodor/csg