Avoid using `len(x)` to check if x is empty

sickbeard/__init__.py

sickbeard/clients/deluge_client.py

sickbeard/dailysearcher.py

sickbeard/failed_history.py

sickbeard/generic_queue.py

sickbeard/helpers.py

sickbeard/metadata/generic.py

sickbeard/notifiers/emailnotify.py

sickbeard/notifiers/prowl.py

sickbeard/nzbSplitter.py

sickbeard/postProcessor.py

sickbeard/properFinder.py

sickbeard/providers/binsearch.py

sickbeard/providers/freshontv.py

sickbeard/providers/newpct.py

sickbeard/providers/tntvillage.py

sickbeard/providers/womble.py

sickbeard/scene_numbering.py

sickbeard/search.py

sickbeard/searchBacklog.py