sha1.rb in rubysl-digest-2.0.3

- old
+ new

@@ -1,9 +1,10 @@
 # just for compatibility; requiring "sha1" is obsoleted
 #
 # $RoughId: sha1.rb,v 1.4 2001/07/13 15:38:27 knu Exp $
 # $Id: sha1.rb 12008 2007-03-06 10:12:12Z knu $
 
+require 'digest'
 require 'digest/sha1/sha1'
 
 class SHA1 < Digest::SHA1
   class << self
     alias orig_new new