Fixing bug that results in object cache not being used for check_user_suspend, resulting in hundreds of duplicate queries

[nickchomey]

I am getting hundreds of duplicate queries as a result of this function. When a user is not suspended, the wpdb query returns null, which the wp_cache_get mechanism in some object caching plugins treat as not existing.

The plugin that I am using is Redis Object Cache, and I submitted a pull request to them which was already merged. But there are surely other plugins that BB users are using that behave similarly and they'll never know.

If we instead store 0 when the user is not suspended, then it will work appropriately with any object caching plugin.

Jira Issue: