bug#3874: 23.1.50; Overlays before-string and after-string does not obey buffer-visibility-spec

[Chong Yidong]

Lennart Borgman <lennart.borgman@gmail.com> writes:

> ;;;; Eval this defun, place point at the end of the buffer and call
> ;;;; it. It inserts text and an overlay in the buffer.
> ;;;;
> ;;;; Play with the different buffer invis specs. It looks like the
> ;;;; overlay is not affected by the specs.

Fixed in trunk.  Thanks.