Attribute filter warnings in the IdP log since installing the OIDC extension

[Rod Widdowson]

Keith,

That is an incredibly useful log, thanks.

I just checked the OIDC code and that paradigm (of returning null rather than an empty set) is systemic in that method, but it looks
like an easy fix to make.

To answer your initial question, that error should happen so rarely that I'd imagine you would be OK to supress it until such time
as the plug-in gets fixed.  The difficulty of course is remembering to turn it back on at that stage.

Rod