0.7.7.8:

	merged APD bug 122 patch (sbcl-devel 2002-08-30)
	Tweak seq.impure.lisp test more or less along the lines of
		APD's explanation of the pathname problem. (SUBSEQ is
		FLUSHABLE, and validly so. The old test bogusly relied
		on it not being flushed and/or the compiler not being
		infernally clever about type inference.)