TYPEP misidentifies subclasses of SEQUENCE

[paulapatience]

TYPEP doesn't identify subclasses of SEQUENCE as sequences on Clasp 2.7.0-249-g0434f374d.

(defclass my-sequence (standard-object sequence) ())

(typep (make-instance 'my-sequence) 'sequence) ; => NIL

Returns T on SBCL.

[Bike]

The problem is probably the typep compiler macro, which still expects sequences to be lists or vectors. It might be prudent to just eliminate that and fall back to the subclass check.