Fix a traceback when creating a conversation tab

poezio/tabs/basetabs.py

@@ -451,7 +451,7 @@ class ChatTab(Tab):
         Tab.__init__(self, core)
         self.name = jid
         self.text_win = None
-        self.remote_wants_chatstates = False
+        self._remote_wants_chatstates = False
         self.directed_presence = None
         self._text_buffer = TextBuffer()
         self.chatstate = None   # can be "active", "composing", "paused", "gone", "inactive"
@@ -488,6 +488,10 @@ class ChatTab(Tab):
             for message in logs:
                 self._text_buffer.add_message(**message)
 
+    @property
+    def remote_wants_chatstates(self):
+        return self._remote_wants_chatstates
+
     @property
     def general_jid(self):
         return NotImplementedError

poezio/tabs/muctab.py

@@ -69,7 +69,7 @@ class MucTab(ChatTab):
         # We send active, composing and paused states to the MUC because
         # the chatstate may or may not be filtered by the MUC,
         # that’s not our problem.
-        self.remote_wants_chatstates = True
+        self._remote_wants_chatstates = True
         # Self ping event, so we can cancel it when we leave the room
         self.self_ping_event = None
         # UI stuff