Set slots to empty list by default

lordi · lordi · commit 3a0afbbfad54 · 2017-10-03T21:17:49.000+02:00
diff --git a/syncrypt/backends/binary.py b/syncrypt/backends/binary.py
@@ -757,7 +757,7 @@ def __init__(self):
         self.concurrency = None
 
         self._monitor_task = None
-        self.slots = None
+        self.slots = []
         self.loop = None
 
     def init(self):
