split the cases for better messages

bstrd/bscache.py

@@ -92,7 +92,11 @@ class BSCache:
         self.channels[name] = cfg
         self.pt.start()
 
-        while self.data is None or name not in self.data:
+        while self.data is None:
+            print("dropping empty data")
+            next(self)
+
+        while name not in self.data:
             print("dropping data that is missing new channel:", name)
             next(self)