Fix descriptor output in ECPG.

Michael Meskes <meskes@postgresql.org>

Commit: 9f5b3a1a1eb7f4b3b768654867777e0877bfda04
Author: Michael Meskes <meskes@postgresql.org>
Date: 2014-01-09T14:51:11Z
Releases: 9.1.12
Fix descriptor output in ECPG.

While working on most platforms the old way sometimes created alignment
problems. This should fix it. Also the regresion tests were updated to test for
the reported case.

Report and fix by MauMau <maumau307@gmail.com>

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