Does not seem to delete directories when you use -L dailydir

I seem to end up with a load of empty directories.

```
root     31824     1  4 Dec03 ?        07:08:24 /usr/local/bin/rotter -j -L dailydir -a -f mp3 -c 2 -n rotter -d168 -b320 /rot

root@obneill:~/rotter-0.9/src# ll -d /rot/2021-11-26
drwxr-xr-x 2 root root 4096 Dec  4 01:00 /rot/2021-11-26
root@obneill:~/rotter-0.9/src# ll /rot/2021-11-26
total 0
```