* goops.scm (process-class-pre-define-generic,

* goops.scm (process-class-pre-define-generic,
process-class-pre-define-accessor, process-define-generic,
process-define-accessor): New functions.
(define-class-pre-definition): Use
process-class-pre-define-generic and
process-class-pre-define-accessor; Make sure not to create a new
local variable if the variable has been imported.
(define-generic): Use process-define-generic.
(define-accessor): Use process-define-accessor.