allow sending None tune on startup. Fixes #4512

src/common/connection.py

@@ -153,7 +153,7 @@ class Connection(ConnectionHandlers):
 		self.blocked_list = []
 		self.blocked_contacts = []
 		self.blocked_groups = []
-		self.music_track_info = None
+		self.music_track_info = 0
 		self.pep_supported = False
 		self.mood = {}
 		self.tune = {}