Should fix day_change plugin

plugins/day_change.py

@@ -24,8 +24,7 @@ class Plugin(BasePlugin):
             if (isinstance(tab, tabs.MucTab) or
                 isinstance(tab, tabs.PrivateTab) or
                 isinstance(tab, tabs.ConversationTab)):
-                room = tab.get_room()
-                room.add_message(msg)
+                tab.add_message(msg)
 
         self.core.refresh_window()
         self.schedule_event()

src/tabs.py

@@ -1995,6 +1995,9 @@ class ConversationTab(ChatTab):
         if config.get('send_chat_states', 'true') == 'true':
             self.send_chat_state('gone')
 
+    def add_message(self, txt, time=None, nickname=None, forced_user=None):
+        self._text_buffer.add_message(txt, time, nickname, None, None, forced_user)
+
 class MucListTab(Tab):
     """
     A tab listing rooms from a specific server, displaying various information,