0.7.5.13:

0.7.5.13:
	Linux floating point fixes
	... define an os_restore_fp_control() function in the runtime, and
		use it in signal handlers (protected by #ifdef
		LISP_FEATURE_LINUX in non-Linux-specific code)
	... write useful definitions of it
		... for x86 (probably correct)
		... for ppc (works, but could do with fixing)
	... delete a SET_FPU_CONTROL_WORD from initialization
		... dunno why it was there; no observable symptoms. Shout
			if some early x86/Linux system no longer works.
	... export to C (via sbcl.h) Lisp's view of the floating point
		control word
	... delete some floating-point-related stale symbols and comments
		from package-data-list.lisp-expr
	Now floating point stuff mostly works (I think) on x86/Linux and
		ppc/Linux, as well as sparc/SunOS. Other platforms still
		probably don't work.