Fix multiple paths cleaning
Fix multiple paths cleaning

An issue arises in the following use case:
- Add folder '/path/to/my/folder1'
- Add folder '/path/to/my/folder2'
- Scan one of the folder, the other will be deleted

nicolasmartinelli/oomusic,nicolasmartinelli/oomusic,DocMarty84/oomusic,DocMarty84/oomusic