0.7.3.18:

0.7.3.18:
	Merged def!constant patch (CSR sbcl-devel 2002-05-17)
	... cross-compiler now starts knowing about constant values
	src/compiler/assem tweaks
	... declare some things ignorable
	... comment tweaks
	other backend tweaks
	... declare the type for with-adjustable-vector
		[ the fact that I had to do this four times, once for each
		  backend, is not optimal. ]