Cipher#reset should not reset the internal state for stream cipher

0% cat reset.rb 
require 'openssl'

cipher = OpenSSL::Cipher::Cipher.new("RC4")
cipher.encrypt
cipher.key = "\0\1\2\3" * (128/8/4)
str = cipher.update('hello,world')
str += cipher.final
p str

cipher.reset
cipher.iv = "\0" * 16
str = cipher.update('hello,world')
str += cipher.final
p str
0% ruby -v reset.rb
ruby 1.9.3dev (2010-09-16 trunk 29265) [x86_64-linux]
"%E\x96\xDAZ\xEF\xB2$/\x9F\x02"
">aV\xB0\xE1l\xF3oyL\x9B"
0% jruby reset.rb
"%E\226\332Z\357\262$/\237\002"
"%E\226\332Z\357\262$/\237\002"