[gimp] app: fix total weight calc. of hardness convolution kernel

[N/A <ell src gnome org>]

commit 5255d91032b28cc0c48c49b42091a6de11d48f4f
Author: Ell <ell_se yahoo com>
Date:   Sat Apr 8 07:37:28 2017 -0400

    app: fix total weight calc. of hardness convolution kernel

 app/core/gimpbrush-transform.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/app/core/gimpbrush-transform.c b/app/core/gimpbrush-transform.c
index cdfc0a1..f8af255 100644
--- a/app/core/gimpbrush-transform.c
+++ b/app/core/gimpbrush-transform.c
@@ -761,7 +761,7 @@ gimp_brush_transform_blur (GimpTempBuf *buf,
   gint        rh           = MIN (r, height - 1);
   gfloat      n            = 2 * r + 1;
   gfloat      n_r          = n * r;
-  gfloat      weight       = (n * n / 2) * (n * n / 2 + 1);
+  gfloat      weight       = floor (n * n / 2) * (floor (n * n / 2) + 1);
   gfloat      weight_inv   = 1 / weight;
   gint        x;
   gint        y;