Remove some unnecessary casts in format arguments

Peter Eisentraut <peter@eisentraut.org>

Commit: ae03a7c7391dfc59f14226b7cfd8ef9f3390e56f
Author: Peter Eisentraut <peter@eisentraut.org>
Date: 2021-08-08T20:08:07Z
Releases: 15.0
Remove some unnecessary casts in format arguments

We can use %zd or %zu directly, no need to cast to int.  Conversely,
some code was casting away from int when it could be using %d
directly.

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