0.8alpha.0.40:

0.8alpha.0.40:
	Firefighting the build, part I
	... make SLOT-VALUE work on :READ-ONLY T structure slots
	Notes:

	* This version may have a subtle breakage that may or may not
	bite.  The forthcoming 0.8alpha.0.41 commit will fix that
	subtle breakage, but it was fixed chronologically before in my
	tree, so I haven't taken out that fix to test this one in
	isolation.  I hope that makes sense...)

	* The new implementation of MAKE-LOAD-FORM-SAVING-SLOTS seems
	very slow; this may be a perceptual problem.  What is
	incontrovertible is that it is very noisy; it chatters about
	compiling many top-level forms, caused by PCL generating
	LOAD-TIME-VALUE forms for ENSURE-ACCESSOR to optimize SLOT-VALUE.
	A fix for this, at least for structure objects, will probably be
	forthcoming in 0.8alpha.0.4x.