Workflow-ng warning with Memcache

I'm currently getting warnings about a 'serialized' column not being present in the 'cache_workflow_ng' table. Some searching turned up this issue (where you can see that someone else has had this exact problem):
http://drupal.org/node/176915

In order to make Workflow-ng Memcache-friendly, it needs a 'hook_devel_caches()' function added to let other modules know that it implements its own cache table. Of course, that will only help if you install the Memcache module after you install Workflow-ng. How about an update hook in Workflow-ng that checks if Memcache is installed, and then adds the 'serialized' column to the 'cache_workflow_ng' table? The only other option is to manually add the column, which adds complexity to multi-stage development environments. Thoughts?