+;;;; modified 2015.01.29 Mitsutoshi NAKANO <bkbin005@rinku.zaq.ne.jp>
+;;; ARAI Shun-ichi <hermes@ceres.dti.ne.jp> wrote better fix.
+;;; https://sourceforge.jp/projects/tamago-tsunagi/lists/archive/misc/2015-January/000036.html
+;;; So Mitsutoshi rewrote.