Fix portability issue in tests from commit ce773f230.
Modern POSIX seems to require strtod() to accept "-NaN", but there's
nothing about NaN in SUSv2, and some of our oldest buildfarm members
don't like it. Let's try writing it as -'NaN' instead; that seems
to produce the same result, at least on Intel hardware.
Per buildfarm.
Branch
------
REL_12_STABLE
Details
-------
https://git.postgresql.org/pg/commitdiff/1fab33c0b612c7d87b97842fe5eb07871ec2c222
Modified Files
--------------
src/test/regress/expected/hash_func.out | 4 ++--
src/test/regress/sql/hash_func.sql | 4 ++--
2 files changed, 4 insertions(+), 4 deletions(-)