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Using (SCM)0

From: Ludovic Courtès
Subject: Using (SCM)0
Date: Fri, 10 Oct 2003 15:33:32 +0200
User-agent: Mutt/1.5.4i [Guile enabled] 
Hi,

Is there anything wrong with using (SCM)0 as a "special value" in C
code?  In other words, is it possible for a "real" SCM object to be
equal to zero, in which case I'd better use SCM_UNDEFINED or some such?

Thanks,
Ludovic.
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