mod_vcard_muc: Pass room object around instead of JID, hopefully fixing traceback More efficient to pass the object around instead of using the JID and looking up the object when needed. It seems in some (undetermined) cases get_room_from_jid(room.jid) is nil.

This module discards typing notifications sent to a bare host JID,
preventing error replies to be sent. These errors are harmless but can
be annoying sometimes if your client shows them prominently.