This should report it in the weather interface, but it won't be the main temperature. It would be possible to test it, and see if it was a good thing. (I'm very suspicious, I haven't touched the code in a while, and it compiled without error the first time.) If you can test that, we can at least report it and I can see about adding a button to swap it.
OnStep (maybe X only?), If I recall correctly also does the temperature compensation automatically. (Or can) I need to double check that statement, and I probably need to get some new hardware to test...