traceback when canceling, when a password is asked to join a MUC
Traceback (most recent call last):
File "dialogs.pyc", line 1481, in on_input_dialog_destroy
File "gajim.py", line 1394, in on_cancel
AttributeError: 'MessageWindow' object has no attribute 'get_gc_control'
How to reproduce: Simply join a MUC needing a password to be joined. Cancel. Fail