Trac RecaptchaRegisterPlugin problems

The RecaptchaRegisterPlugin Trac extension has a few minor defects I noticed while testing it out for production use. The first problem, the captcha input would disappear if any other fields were invalid. The second problem, if the captcha field was invalid, any existing for data was lost. Here is my updated version of process_request() that addresses both issues.

#RecaptchaRegister trac plugin fix.

# IRequestHandler methods
def process_request(self, req):
  self.check_config()
  action = req.args.get('action')

  if req.method == 'POST' and action == 'create':
      response = captcha.submit(
          req.args['recaptcha_challenge_field'],
          req.args['recaptcha_response_field'],
          self.private_key,
          req.remote_addr,
          )
      if not response.is_valid:
          data = {'acctmgr' : { 'username' : req.args['user'],
                                'name' : req.args['name'],
                                'email' : req.args['email'],
                              },
          }
          data['registration_error'] = 'Captcha incorrect. Please try again.'
          data['recaptcha_javascript'] = captcha.displayhtml(self.public_key)
          data['recaptcha_theme'] = self.theme
          return "recaptcharegister.html", data, None
      else:
          ret = super(RecaptchaRegistrationModule, self).process_request(req)
          h, data, n = ret
          data['recaptcha_javascript'] = captcha.displayhtml(self.public_key)
          data['recaptcha_theme'] = self.theme
          return "recaptcharegister.html", data, n
  else:
      ret = super(RecaptchaRegistrationModule, self).process_request(req)
      h, data, n = ret
      data['recaptcha_javascript'] = captcha.displayhtml(self.public_key)
      data['recaptcha_theme'] = self.theme
      return "recaptcharegister.html", data, n