pgsql: Clean up some code using "(expr) ? true : false"

Clean up some code using "(expr) ? true : false"

All the code paths simplified here were already using a boolean or used
an expression that led to zero or one, making the extra bits
unnecessary.

Author: Justin Pryzby
Reviewed-by: Tom Lane, Michael Paquier, Peter Smith
Discussion: https://postgr.es/m/20210428182936.GE27406@telsasoft.com

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/fd0625c7a9c679c0c1e896014b8f49a489c3a245

Modified Files
--------------
contrib/intarray/_int_tool.c                | 2 +-
contrib/ltree/ltree_gist.c                  | 2 +-
contrib/sepgsql/selinux.c                   | 2 +-
src/backend/access/gin/gindatapage.c        | 2 +-
src/backend/access/gin/ginutil.c            | 2 +-
src/backend/access/gist/gistsplit.c         | 4 ++--
src/backend/access/hash/hash.c              | 2 +-
src/backend/access/hash/hashinsert.c        | 2 +-
src/backend/access/hash/hashovfl.c          | 2 +-
src/backend/access/hash/hashpage.c          | 2 +-
src/backend/access/heap/heapam_visibility.c | 2 +-
src/backend/executor/spi.c                  | 2 +-
src/backend/jit/jit.c                       | 2 +-
src/backend/optimizer/util/pathnode.c       | 4 ++--
src/backend/statistics/mcv.c                | 2 +-
src/backend/storage/file/buffile.c          | 2 +-
src/backend/tsearch/ts_parse.c              | 2 +-
src/backend/utils/adt/bool.c                | 2 +-
src/backend/utils/adt/ruleutils.c           | 4 ++--
src/backend/utils/adt/tsquery_gist.c        | 2 +-
src/backend/utils/adt/tsquery_util.c        | 2 +-
src/backend/utils/fmgr/dfmgr.c              | 2 +-
22 files changed, 25 insertions(+), 25 deletions(-)