Use buffer-string in a more portable way in lyskom-protocol-error

src/parse.el

@@ -1153,7 +1153,9 @@ functions and variables that are connected with the lyskom-buffer."
                                           (let* ((buffer (generate-new-buffer " *Backtrace*"))
                                                  (standard-output buffer))
                                             (backtrace)
-                                            (prog1 (buffer-string nil nil buffer)
+                                            (prog1 (save-excursion
+                                                     (set-buffer buffer)
+                                                     (buffer-string))
                                               (kill-buffer buffer)))
                                           (lyskom-string-to-parse))
                                     lyskom-backtrace-list))