citext tests "with and without index" had no index

I added the CREATE INDEX statement in the below citext regression
tests, since it seemed to have been omitted by accident:

-- Test aggregate functions and sort ordering

CREATE TEMP TABLE srt (
   name CITEXT
);

INSERT INTO srt (name)
VALUES ('aardvark'),
       ('AAA'),
       ('aba'),
       ('ABC'),
       ('abd');

CREATE INDEX srt_name ON srt (name);

-- Check the min() and max() aggregates, with and without index.
set enable_seqscan = off;
SELECT MIN(name) AS "AAA" FROM srt;
SELECT MAX(name) AS abd FROM srt;
reset enable_seqscan;
set enable_indexscan = off;
SELECT MIN(name) AS "AAA" FROM srt;
SELECT MAX(name) AS abd FROM srt;
reset enable_indexscan;

-- Check sorting likewise
set enable_seqscan = off;
SELECT name FROM srt ORDER BY name;
reset enable_seqscan;
set enable_indexscan = off;
SELECT name FROM srt ORDER BY name;
reset enable_indexscan;

--
Kevin Grittner
EDB: http://www.enterprisedb.com
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