source_wrapper.pl: fixed a bug when usertable was undefined
source_wrapper.pl: fixed a bug when usertable was undefined

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