FORWARD-REFERENCED-CLASSes; error reporting on
CLASS-DEFAULT-INITARGS, CLASS-PRECEDENCE-LIST and CLASS-SLOTS
has been improved;
+ ** SXHASH on CLOS instances now uses a slot internal to the
+ instance to return different numbers on distinct instances,
+ while preserving the same return value through invocations of
+ CHANGE-CLASS;
* fixed some bugs shown by Paul Dietz' test suite:
** DOLIST puts its body in TAGBODY
** SET-EXCLUSIVE-OR sends arguments to :TEST function in the