pgsql: Fix compiler warning in non-assert builds, introduced in f862d57

Fix compiler warning in non-assert builds, introduced in f862d57057f. Discussion: https://postgr.es/m/20220203183655.ralgkh54sdcgy...@alap3.anarazel.de Backpatch: 14-, like f862d57057f Branch -- REL_14_STABLE Details --- https://git.postgresql.org/pg/commitdiff/2a3958e4d9b9b1e82adefa11f

pgsql: Fix compiler warning in non-assert builds, introduced in f862d57

Fix compiler warning in non-assert builds, introduced in f862d57057f. Discussion: https://postgr.es/m/20220203183655.ralgkh54sdcgy...@alap3.anarazel.de Backpatch: 14-, like f862d57057f Branch -- master Details --- https://git.postgresql.org/pg/commitdiff/7c1aead6cbe7dcc6c216715fed7a1fb6