Add (Value Spectral)

Add (Value Spectral)

In earlier versions when fed NIL on it’s input it put out an empty string instead of NIL

In beta18 it outputs NIL effectively breaking some patches that don’t have AvoidNIL to correct the error.

Is this a desired behavior and a new design meaning error correction will have to be built in into some patches?
Or is it a bug?

fixed for beta>=19