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Restore handling of -0 in the C field of lines in line_construct().

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Commit a7dc63d904 inadvertedly removed this bit originally introduced
by 43fe90f66a, causing regression test failures on some platforms,
due to producing {1,-1,-0} instead of {1,-1,0}.
This commit is contained in:
Tomas Vondra
2018-07-29 20:35:18 +02:00
parent fb17eabf1b
commit 74294c7301
1 changed files with 3 additions and 0 deletions
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3
src/backend/utils/adt/geo_ops.c
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@ -1024,6 +1024,9 @@ line_construct(LINE *result, Point *pt, float8 m)
result->A = m; result->A = m;
result->B = -1.0; result->B = -1.0;
result->C = pt->y - m * pt->x; result->C = pt->y - m * pt->x;
/* on some platforms, the preceding expression tends to produce -0 */
if (result->C == 0.0)
result->C = 0.0;
} }
} }