chat_destroy_cb: use chat_update_contacts_visibility instead of empathy_chat_set_show_contacts
chat_destroy_cb: use chat_update_contacts_visibility instead of empathy_chat_set_show_contacts

That way priv->show_contacts is not changed and we'll redisplay the contact
list when reconnecting if needed (#598964).

Distrotech/telepathy-account-widgets,Distrotech/telepathy-account-widgets,GNOME/telepathy-account-widgets,GNOME/telepathy-account-widgets,GNOME/telepathy-account-widgets