pgsql: Add comment about why "((void) 0)" is used in copy macros.

From: momjian(at)postgresql(dot)org (Bruce Momjian)
To: pgsql-committers(at)postgresql(dot)org
Subject: pgsql: Add comment about why "((void) 0)" is used in copy macros.
Date: 2009-06-03 14:48:33
Message-ID: 20090603144833.BF88B75331E@cvs.postgresql.org
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Log Message:
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Add comment about why "((void) 0)" is used in copy macros.

Modified Files:
--------------
pgsql/src/backend/commands:
copy.c (r1.309 -> r1.310)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/copy.c?r1=1.309&r2=1.310)

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