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From: "Richard M. Stallman" <rms@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: LGLYPH_SET_CODE
Date: Fri, 29 Aug 2008 19:48:08 -0400
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Cc: eliz@gnu.org, emacs-devel@gnu.org
To: Kenichi Handa <handa@m17n.org>
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Xref: news.gmane.org gmane.emacs.devel:103230
Archived-At: <http://permalink.gmane.org/gmane.emacs.devel/103230>

    It is intended that VAL is not negative.  That macro is
    called at four places, and except for one place, it is
    assured that VAL is never negative.

At least there should be a loud comment next to the definition,
"Make sure VAL is not negative!"