akr	2007-06-28 23:22:30 +0900 (Thu, 28 Jun 2007)

  New Revision: 12651

  Modified files:
    trunk/main.c
    trunk/signal.c

  Log:
    debug environment variable refined.


  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi/trunk/signal.c?r1=12651&r2=12650
  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi/trunk/main.c?r1=12651&r2=12650