0.7.1.47:

0.7.1.47:
	reviewed OPTIMIZE declarations, (mostly trying to avoid
		inadvertently imposing large %DETECT-STACK-EXHAUSTION
		overhead)...
	...bumped SAFETY 1 to SAFETY 2 in warm.lisp (since
		(> SPEED SAFETY) isn't what we want)
	...changed (SPEED 3) (SAFETY 3) to (SPEED 2) (SAFETY 2) in
		SORT logic
	...removed OPTIMIZE declarations in time.lisp, since there's
		no up-to-date compelling reason to use other than the
		default optimization there.
	...removed (OPTIMIZE (SAFETY 3)) in DEFTRANSFORM ARRAY-HEADER-P,
		since there seems to be no reason for it
	rearranged insert-%DETECT-STACK-EXHAUSTION code to make
		indentation less ridiculous