pgsql: Minor mop-up for List improvements.

Minor mop-up for List improvements.

Fix a few places that were using written-out versions of the
pg_list.h macros that commit cc99baa43 just improved, making them
also use those macros so as to gain whatever performance improvement
is to be had.

Discussion: https://postgr.es/m/CAApHDvpo1zj9KhEpU2cCRZfSM3Q6XGdhzuAS2v79PH7WJBkYVA@mail.gmail.com

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/9d299a492454f9ffdf0fd8fe1fd6303c8ddf805a

Modified Files
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src/backend/catalog/objectaddress.c |  2 +-
src/backend/commands/sequence.c     |  2 +-
src/backend/nodes/list.c            | 12 ++++++------
3 files changed, 8 insertions(+), 8 deletions(-)