Patches for org-plot / gnuplot integration

patch-1.

diff --git a/lisp/org-plot.el b/lisp/org-plot.el
index 556b9ef..aa5db9a 100644
--- a/lisp/org-plot.el
+++ b/lisp/org-plot.el
@@ -346,7 +346,7 @@ line directly before or after the table."
 	(gnuplot-send-buffer-to-gnuplot))
       ;; cleanup
       (bury-buffer (get-buffer "*gnuplot*"))
-      (run-with-idle-timer 0.1 nil (lambda () (delete-file data-file))))))
+      (run-with-idle-timer 0.1 nil #'delete-file data-file))))
 
 (provide 'org-plot)