[gimp] app: add a little more headroom to the smudge buffer

[Nils Philippsen <nphilipp src gnome org>]

commit ff6c2807bea09d8e0488658b74ac5d903a9a6bb4
Author: Nils Philippsen <nils redhat com>
Date:   Wed Apr 11 19:04:58 2012 +0200

    app: add a little more headroom to the smudge buffer
    
    This fixes crashes when smudging with sizes <= 1.4, filed against Fedora
    (rhbz#810850).

 app/paint/gimpsmudge.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/app/paint/gimpsmudge.c b/app/paint/gimpsmudge.c
index fd58888..b9b9253 100644
--- a/app/paint/gimpsmudge.c
+++ b/app/paint/gimpsmudge.c
@@ -376,6 +376,7 @@ gimp_smudge_accumulator_size (GimpPaintOptions *paint_options,
                               gint             *accumulator_size)
 {
 
-  /* Note: the max brush mask size plus a border of 1 pixel */
-  *accumulator_size = ceil (sqrt (2 * SQR(paint_options->brush_size)) + 2);
+  /* Note: the max brush mask size plus a border of 1 pixel and a little
+   * headroom */
+  *accumulator_size = ceil (sqrt (2 * SQR (paint_options->brush_size + 1)) + 2);
 }