0.8.7.56:

0.8.7.56:
	Fix for bug revealed by ITERATE on PPC
	... the powerpc backend has no branch delay slot, so putting the
		last defaulting operation after the branch doesn't work
		so well
	... neither does the alpha, so fix that too, even though with a
		higher REGISTER-ARG-COUNT value it's not exposed by
		ITERATE
	... cook up a test case that's likely to catch the problem
		elsewhere, if present