Fix #1695 about bacula-sd crash in detach_dcr_from_dev()
Fix #1695 about bacula-sd crash in detach_dcr_from_dev()

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