* fixed bug 321: define-method-combination argument lambda lists do
not cause invalid code to be generated when &optional or &aux
variables have default values. (reported by Bruno Haible)
+ * fixed bug 327: system subclasses of STRUCTURE-OBJECT or CONDITION
+ have CLOS classes; this appears also to have fixed reported
+ instability in stack exhaustion detection.
* optimization: rearranged the expansion of various defining macros
so that each expands into only one top-level form in a
:LOAD-TOPLEVEL context; this appears to decrease fasl sizes by