Fix #1511 when trying to insert more than 50.000 directories in bvfs
Fix #1511 when trying to insert more than 50.000 directories in bvfs

rkorzeniewski/bacula,rkorzeniewski/bacula,rkorzeniewski/bacula,rkorzeniewski/bacula,rkorzeniewski/bacula,rkorzeniewski/bacula,rkorzeniewski/bacula,rkorzeniewski/bacula