FIX: fixed a small mistake in t_catalog_traversal.cc
FIX: fixed a small mistake in t_catalog_traversal.cc

cvmfs/cvmfs,DrDaveD/cvmfs,alhowaidi/cvmfsNDN,reneme/cvmfs,DrDaveD/cvmfs,Moliholy/cvmfs,cvmfs/cvmfs,Moliholy/cvmfs,reneme/cvmfs,djw8605/cvmfs,trshaffer/cvmfs,djw8605/cvmfs,trshaffer/cvmfs,DrDaveD/cvmfs,alhowaidi/cvmfsNDN,djw8605/cvmfs,DrDaveD/cvmfs,cvmfs/cvmfs,Gangbiao/cvmfs,Gangbiao/cvmfs,DrDaveD/cvmfs,cvmfs/cvmfs,Gangbiao/cvmfs,cvmfs/cvmfs,cvmfs/cvmfs,reneme/cvmfs,djw8605/cvmfs,trshaffer/cvmfs,DrDaveD/cvmfs,trshaffer/cvmfs,reneme/cvmfs,reneme/cvmfs,Gangbiao/cvmfs,Moliholy/cvmfs,Moliholy/cvmfs,alhowaidi/cvmfsNDN,Moliholy/cvmfs,Gangbiao/cvmfs,cvmfs/cvmfs,DrDaveD/cvmfs,alhowaidi/cvmfsNDN,djw8605/cvmfs,alhowaidi/cvmfsNDN,trshaffer/cvmfs