Use with-current-buffer instead of save-excursion+set-buffer

To silence warning in emacs-24.

src/ChangeLog

 2014-06-19  Christer Ekholm  <che@chrekh.se>
 
+	* lyskom-rest.el (lyskom-doc-view-text): Use with-current-buffer
+	instead of save-excursion+set-buffer to silence warnings in
+	emacs-24. This change is not compatible with emacs older than
+	version 20.1
+
 	* utilities.el: Removed unused function lyskom-buffer-display-message.
 
 2014-06-17  Christer Ekholm  <che@chrekh.se>

src/lyskom-rest.el

@@ -2601,8 +2601,7 @@ in lyskom-messages."
 
 (defun lyskom-doc-view-text (text-no)
   (let ((buf (lyskom-traverse buf (lyskom-buffers-of-category 'doc-view)
-               (save-excursion
-                 (set-buffer buf)
+               (with-current-buffer buf
                  (when (and (boundp 'lyskom-doc-view-text-no)
                             (eq lyskom-doc-view-text-no text-no))
                    (lyskom-traverse-break buf))))))