[gimp] Bug 779827 - Brushes in Symmetry Tiling mode are off by one pixel.

[Jehan Pagès <jehanp src gnome org>]

commit 22247339ce0203163f139b161f260eab42f185ef
Author: Jehan <jehan girinstud io>
Date:   Fri Mar 10 03:56:57 2017 +0100

    Bug 779827 - Brushes in Symmetry Tiling mode are off by one pixel.
    
    Computation for tiled brush position has to be done in integer, not
    double, to avoid funky type conversion rounding.

 app/core/gimpsymmetry-tiling.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/app/core/gimpsymmetry-tiling.c b/app/core/gimpsymmetry-tiling.c
index 44dd7fd..462f5c5 100644
--- a/app/core/gimpsymmetry-tiling.c
+++ b/app/core/gimpsymmetry-tiling.c
@@ -320,11 +320,11 @@ gimp_tiling_update_strokes (GimpSymmetry *sym,
   height = gimp_item_get_height (GIMP_ITEM (drawable));
 
   if (origin->x > 0 && tiling->max_x == 0)
-    startx = origin->x - tiling->interval_x * (gint) (origin->x / tiling->interval_x + 1);
+    startx -= tiling->interval_x * (gint) (origin->x / tiling->interval_x + 1);
 
   if (origin->y > 0 && tiling->max_y == 0)
     {
-      starty = origin->y - tiling->interval_y * (gint) (origin->y / tiling->interval_y + 1);
+      starty -= tiling->interval_y * (gint) (origin->y / tiling->interval_y + 1);
 
       if (tiling->shift > 0.0)
         startx -= tiling->shift * (gint) (origin->y / tiling->interval_y + 1);