better comment

src/tabbed_chat_window.py

@@ -425,7 +425,7 @@ def send_chatstate(self, state):
 		# False if peer does not support jep85
 		# 'ask' if we sent 'active' chatstate and are waiting for reply
 
-		# do nothing if config has typing notifications disabled
+		# do not send nothing if we have chat state notifications disabled
 		if not gajim.config.get('send_chat_state_notifications'):
 			return