downloader: Don't check the age of a worker we just spawned

Not only is this redundant, but it creates a race condition where
the worker fails before the latest_worker = workers[-1] check,
and we get an IndexError.

downloader/downloader/main.py

@@ -219,6 +219,7 @@ class StreamsManager(object):
 				if not workers and quality in self.latest_urls:
 					self.logger.info("Starting new worker for {} as none exist".format(quality))
 					self.start_worker(quality)
+					continue
 				latest_worker = workers[-1]
 				# is the old worker too old?
 				if latest_worker.age() > self.MAX_WORKER_AGE: