A construct like:
has been seen to return, e.g., 4 3 according to the debug word.
Is this nesting forbidden in Forth? Easily fixable? A better way to do
this? I do want a final catch-all since returning no value would have
unexpected results, and we currently do not have a define CONFIG_PPC32
so that a concatenation of independent [IFDEF]...[THEN]s wouldn't work.