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fcf1f27fe8
With some newer gcc versions (8 and 9) you get a -Wformat-overflow
warning here. In PG11 and later this was already fixed. Since it's
trivial, backport it to get the older branches building without
warnings.
This back-patches commit 333a186dc into out-of-support branches,
pursuant to newly-established project policy. The point is to
suppress scary-looking warnings so that people building these
branches needn't expend brain cells verifying that it's safe
to ignore the warnings.
Discussion: https://postgr.es/m/d0316012-ece7-7b7e-2d36-9c38cb77cb3b@enterprisedb.com