Fix a long-standing bug in FloatOut

Fix a long-standing bug in FloatOut

We really should not float anything out of an _inline_me_ Note,
for reasons described in this new comment:
	-- Do no floating at all inside INLINE.
	-- The SetLevels pass did not clone the bindings, so it's
	-- unsafe to do any floating, even if we dump the results
	-- inside the Note (which is what we used to do).

I'm about to get rid of these _inline_me_ Notes, but it's
better to fix it anyway.  I found this bug when implementing System IF.