[COMMITTERS] pgsql: Fix unportable definition of BSWAP64() macro.

Fix unportable definition of BSWAP64() macro.

We have a portable way of writing uint64 constants, but whoever wrote
this macro didn't know about it.

While at it, fix unsafe under-parenthesization of arguments.  That might
be moot, because there are already good reasons not to use the macro on
anything more complicated than a simple variable, but it's still poor
practice.

Per buildfarm warnings.

Branch
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REL9_6_STABLE

Details
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http://git.postgresql.org/pg/commitdiff/cb8ef68b93312e3977f3e60676ded9a553c14064

Modified Files
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src/include/port/pg_bswap.h | 25 +++++++++++++------------
1 file changed, 13 insertions(+), 12 deletions(-)