bug#13278: 24.3.50; Attributes aren't inherited in a copied face across frames

[Katsumi Yamaoka]

(This happens in not only 24.3.50 but also at least 24.2.)
Say copy the built-in face `bold' to `my-bold' as follows:

(copy-face 'bold 'my-bold)
 = my-bold
(face-attribute 'my-bold :weight)
 => bold

That is normal.  However, if `(face-attribute ...)' is done again
in a newly created frame (by `C-x 5 2'), it returns `unspecified',
i.e., that is not a bold face in the new frame.  I've tested it in
only Cygwin Emacs, sorry.

In GNU Emacs 24.3.50.1 (i686-pc-cygwin, X toolkit, Xaw3d scroll bars)
 of 2012-12-26 on localhost
Bzr revision: 111328 yamaoka@jpl.org-20121225221259-r4rry9vo7pnzo5pk
Windowing system distributor `The Cygwin/X Project', version 11.0.11301000
Configured using:
 `configure '--verbose' '--with-x-toolkit=lucid' '--without-imagemagick'
 '--without-dbus' '--without-gconf' '--without-gsettings''