contact_selector_dialog_account_changed_cb: cope with tp_account_get_connection being NULL
contact_selector_dialog_account_changed_cb: cope with tp_account_get_connection being NULL

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