pgsql: Clean up psql/describe.c's messy query for extended stats.

Clean up psql/describe.c's messy query for extended stats.

Remove unnecessary casts, safely schema-qualify the ones that remain,
lose an unnecessary level of sub-SELECT, reformat for tidiness.

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/20c95f27e736837b4af6bef998cb9408d1ad902e

Modified Files
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src/bin/psql/describe.c | 21 ++++++++++++---------
1 file changed, 12 insertions(+), 9 deletions(-)

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