crash in become_target message handler

[Timtam]

Traceback (most recent call last): File "/home/tyler/ygo/ygo-game/ygo/utils.py", line 116, in catch return f(*args, **kwargs) File "/home/tyler/ygo/ygo-game/ygo/duel.py", line 252, in process_messages data = fn(data) File "/home/tyler/ygo/ygo-game/ygo/message_handlers/become_target.py", line 13, in msg_become_target self.cm.call_callbacks('become_target', tc, tl, tseq) File "/home/tyler/ygo/ygo-game/ygo/callback_manager.py", line 20, in call_callbacks callback(*args, **kwargs) File "/home/tyler/ygo/ygo-game/ygo/message_handlers/become_target.py", line 20, in become_target name = self.players[self.chaining_player].nickname AttributeError: 'Duel' object has no attribute 'chaining_player'