inverse.sh: avoid countdown in --clean if there are no files to clean
inverse.sh: avoid countdown in --clean if there are no files to clean

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