Fix crash in IRCClientProtocol.send_messages due to missing overlongmode in unconfirmedMessages

http2irc.py

@@ -451,7 +451,7 @@ class IRCClientProtocol(asyncio.Protocol):
 					self.messageQueue.putleft_nowait((channel, messages[0] + '…', overlongmode))
 			else:
 				self.logger.info(f'Sending {message!r} to {channel!r}')
-				self.unconfirmedMessages.append((channel, message))
+				self.unconfirmedMessages.append((channel, message, overlongmode))
 				self.send(b'PRIVMSG ' + channelB + b' :' + messageB)
 				await asyncio.sleep(1) # Rate limit