Add some opr_sanity checks that the lengths of the various argument-info

Tom Lane <tgl@sss.pgh.pa.us>

Commit: c19781ac3d5e1e3763e3dab87690dabff2d7130a
Author: Tom Lane <tgl@sss.pgh.pa.us>
Date: 2009-11-29T18:53:54Z
Releases: 9.0.0
Add some opr_sanity checks that the lengths of the various argument-info
arrays in a pg_proc entry match.  Seems like an easy mistake to make when
manually adjusting these values in a pg_proc.h entry.

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