Ruby 1.8.6 compatibility.

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@6204 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activerecord/lib/active_record/vendor/mysql.rb

@@ -563,9 +563,9 @@ def scramble(password, message, old_ver)
   def scramble41(password, message)
     return 0x00.chr if password.nil? or password.empty?
     buf = [0x14]
-    s1 = Digest::SHA1.new(password).digest
-    s2 = Digest::SHA1.new(s1).digest
-    x = Digest::SHA1.new(message + s2).digest
+    s1 = Digest::SHA1.digest(password)
+    s2 = Digest::SHA1.digest(s1)
+    x = Digest::SHA1.digest(message + s2)
     (0..s1.length - 1).each {|i| buf.push(s1[i] ^ x[i])}
     buf.pack("C*")
   end