TypeError: int() argument must be a string or a number, not 'NoneType'

[sss]

How to Reproduce

While doing a POST operation on /admin/spamfilter/config, Trac issued an internal error.

(please provide additional details here)

Request parameters:

{'AkismetFilterStrategy_karmapoints': u'5',
 'CaptchaSystem_karmapoints': u'10',
 'ExternalLinksFilterStrategy_karmapoints': u'2',
 'IPThrottleFilterStrategy_karmapoints': u'3',
 'RegexFilterStrategy_karmapoints': u'5',
 'SessionFilterStrategy_karmapoints': u'9',
 '__FORM_TOKEN': u'a7d0ae013a486e9fd0ae6e40',
 'cat_id': u'spamfilter',
 'logging_enabled': u'on',
 'min_karma': u'5',
 'panel_id': u'config',
 'path_info': None}

User Agent was: Mozilla/5.0 (X11; U; Linux x86_64; ru-RU; rv:1.8.1.16) Gecko/20080717 SeaMonkey/1.1.11

System Information

Trac	0.11
Python	2.5.2 (r252:60911, Jun 3 2008, 09:52:39) [GCC 4.2.4 (Gentoo 4.2.4 p1.0)]
setuptools	0.6c8
MySQL	server: "5.0.60-log", client: "5.0.60", thread-safe: 1
MySQLdb	1.2.2
Genshi	0.5.1
mod_python	3.3.1
Pygments	0.10
Subversion	1.5.0 (r31699)
jQuery:	1.2.3

Python Traceback

Traceback (most recent call last):
  File "/usr/lib/python2.5/site-packages/trac/web/main.py", line 423, in _dispatch_request
    dispatcher.dispatch(req)
  File "/usr/lib/python2.5/site-packages/trac/web/main.py", line 197, in dispatch
    resp = chosen_handler.process_request(req)
  File "/usr/lib/python2.5/site-packages/trac/admin/web_ui.py", line 109, in process_request
    path_info)
  File "/usr/lib/python2.5/site-packages/TracSpamFilter-0.2.1cdev_r6883-py2.5.egg/tracspamfilter/admin.py", line 69, in render_admin_panel
    if self._process_config_panel(req):
  File "/usr/lib/python2.5/site-packages/TracSpamFilter-0.2.1cdev_r6883-py2.5.egg/tracspamfilter/admin.py", line 159, in _process_config_panel
    purge_age = int(req.args.get('purge_age'))
TypeError: int() argument must be a string or a number, not 'NoneType'

[rblank]

The parameter purge_age is missing from the POST data, but logging_enabled is on, so theoretically, the purge_age control should have been enabled.

I wonder if the JavaScript snippet at the top of the template admin_spamconfig.html is correct. It calls .click() on the logging_enabled control. Won't this toggle the control? Shouldn't .change() be used?