- Synced preproc.y with gram.y

Michael Meskes <meskes@postgresql.org>

Commit: e895eb197df2ae3af871d395e299271e0ddf11b5
Author: Michael Meskes <meskes@postgresql.org>
Date: 2003-07-14T10:16:45Z
Releases: 7.4.1
        - Synced preproc.y with gram.y
        - Init sqlca in ECPGprepare().
        - Added CLOSE DATABASE for Informix compatibility.

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