* libguile/struct.h (SCM_VTABLE_BASE_LAYOUT, scm_vtable_index_self):
Remove "self" field. Renumber the other fields.
* module/oop/goops.scm (<self-slot>): Remove.
(fold-class-slots): Adapt for "self" slot removal. Adapt all users.
(class-redefinition): Now that there is no "self" slot to update, use
%modify-instance instead of %modify-class.
* libguile/goops.c (class_self): Remove.
(scm_sys_modify_class): Remove.
* libguile/goops.h (scm_sys_modify_class): Remove.
* module/rnrs/records/procedural.scm: Import vtable-offset-user.
Renumber rtd indexes using vtable-offset-user.
* module/srfi/srfi-35.scm (%condition-type-vtable): Remove mention of
vtable fields.
* module/system/base/types.scm (address->inferior-struct): Adapt for
different vtable field layout.
* module/srfi/srfi-35.scm (%make-condition-type): New procedure.
(make-condition-type, make-compound-condition-type): Use it.
* test-suite/tests/srfi-35.test ("condition
types")["struct-vtable-name"]: New test.
* module/srfi/srfi-35.scm: Use `(ice-9 syncase)'.
(define-condition-type, condition): Rewritten using `syntax-rules'.
(compound-condition, condition-instantiation): New helper internal
macros. Thanks to Andy Wingo for his help!
