Subject: Fix incorrect PG_GETARG in pgcrypto

From: shihao zhong <[email-masked]>
Date: Mon, 12 Feb 2024 23:30:40 -0500

Hi hackers,

I'd like to bring to your attention that I recently identified some
functions in pgcrypto that are using PG_GETARG functions in a way that
doesn't match the expected function signature of the stored
procedures. This patch proposes a solution to address these
inconsistencies and ensure proper alignment.

Thanks,
Shihao