Attempt to fix compiler warning on old compiler

Peter Eisentraut <peter@eisentraut.org>

Commit: 506428d091760650971433f6bc083531c307b368
Author: Peter Eisentraut <peter@eisentraut.org>
Date: 2022-07-16T13:47:27Z
Releases: 16.0
Attempt to fix compiler warning on old compiler

A couple more like b449afb582bb9015bfbb85abc10ce122aef9ec70, per
complaints from lapwing.

Files

PathChange+/−
contrib/pg_prewarm/autoprewarm.c modified +4 −2
contrib/postgres_fdw/postgres_fdw.c modified +2 −1