"IndexError: list index out of range" when given a non-ascii string

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Execute nilsimsa.Nilsimsa(text).hexdigest() where text contains non-ascii 
characters (Korean (UTF-8), in my case)
2.
3.

What is the expected output? What do you see instead?
I should produce a hexdigest.

What version of the product are you using? On what operating system?
Python 2.7.3
Linux quantal64 3.5.0-17-generic #28-Ubuntu SMP Tue Oct 9 19:31:23 UTC 2012 
x86_64 x86_64 x86_64 GNU/Linux
Distributor ID: Ubuntu
Description:    Ubuntu 12.10
Release:        12.10
Codename:       quantal

Please provide any additional information below.

Execute nilsimsa.Nilsimsa('호준이는 비싼 학비 때문에 허리가 
휘어집니다').hexdigest()

Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1701, in __call__
    return self.wsgi_app(environ, start_response)
  File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1689, in wsgi_app
    response = self.make_response(self.handle_exception(e))
  File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1687, in wsgi_app
    response = self.full_dispatch_request()
  File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1360, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1358, in full_dispatch_request
    rv = self.dispatch_request()
  File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1344, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/vagrant/app/core.py", line 420, in lsh
    row.original_text_lsh = nilsimsa.Nilsimsa(row.original_text).hexdigest()
  File "/usr/local/lib/python2.7/dist-packages/nilsimsa/__init__.py", line 97, in __init__
    self.update(chunk)
  File "/usr/local/lib/python2.7/dist-packages/nilsimsa/__init__.py", line 112, in update
    self.acc[self.tran3(ch, self.lastch[0], self.lastch[1], 0)] +=1
  File "/usr/local/lib/python2.7/dist-packages/nilsimsa/__init__.py", line 101, in tran3
    return (((TRAN[(a+n)&255]^TRAN[b]*(n+n+1))+TRAN[(c)^TRAN[n]])&255)
IndexError: list index out of range

Original issue reported on code.google.com by [email protected] on 10 Apr 2013 at 8:07