* lisp/emacs-lisp/ewoc.el (ewoc--refresh-node): Save and restore point line
and column offset.
(eowc-map) (ewoc--invalidate) (ewoc-set-hf): Don't use save-excursion
* lisp/vc/vc-dir.el (vc-dir-update): Don't save/restore point on calling
'ewoc-invalidate'.