From 2e194f33db0437ea2f25c22efdad9552aefcab2f Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Thu, 8 Mar 2012 18:07:22 +0000
Subject: [PATCH] sna/traps: Fix the initialisation of the error term for
 vertical mono edges

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---
 src/sna/sna_trapezoids.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/sna/sna_trapezoids.c b/src/sna/sna_trapezoids.c
index 8e735efe..727b4d2c 100644
--- a/src/sna/sna_trapezoids.c
+++ b/src/sna/sna_trapezoids.c
@@ -776,7 +776,7 @@ polygon_add_line(struct polygon *polygon,
 	if (dx == 0) {
 		e->vertical = true;
 		e->x.quo = p1->x;
-		e->x.rem = 0;
+		e->x.rem = -dy;
 		e->dxdy.quo = 0;
 		e->dxdy.rem = 0;
 	} else {