pgsql: Revert "Tweak "line" test to avoid negative zeros on some platfo

Revert "Tweak "line" test to avoid negative zeros on some platforms"

This reverts commit a0a546f0d94ec6cbb3cd6b1c82f58d801046615f.
It seems better to tweak the code to suppress -0 results during
line_construct_pts(), which I'll do in the next commit.

Branch
------
master

Details
-------
http://git.postgresql.org/pg/commitdiff/1f7a47912af2206698d14650f2149fa951b8ce07

Modified Files
--------------
src/test/regress/expected/line.out |   18 +++++++++---------
src/test/regress/sql/line.sql      |    2 +-
2 files changed, 10 insertions(+), 10 deletions(-)