[gimp] app: fix iterator area in canvas_buffer_to_paint_buf_alpha()

[N/A <ell src gnome org>]

commit 082a6404c9613beeef4feafdb91ff43994c096dc
Author: Ell <ell_se yahoo com>
Date:   Thu Apr 5 02:14:29 2018 -0400

    app: fix iterator area in canvas_buffer_to_paint_buf_alpha()
    
    The entire ROI was processed in all threads, instead of only the
    thread-specific area, causing artifacts.

 app/paint/gimppaintcore-loops.cc |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/app/paint/gimppaintcore-loops.cc b/app/paint/gimppaintcore-loops.cc
index f923bc5..c02335d 100644
--- a/app/paint/gimppaintcore-loops.cc
+++ b/app/paint/gimppaintcore-loops.cc
@@ -215,7 +215,7 @@ canvas_buffer_to_paint_buf_alpha (GimpTempBuf  *paint_buf,
     {
       GeglBufferIterator *iter;
 
-      iter = gegl_buffer_iterator_new (canvas_buffer, &roi, 0,
+      iter = gegl_buffer_iterator_new (canvas_buffer, area, 0,
                                        babl_format ("Y float"),
                                        GEGL_ACCESS_READ, GEGL_ABYSS_NONE);
 
@@ -350,7 +350,7 @@ do_layer_blend (GeglBuffer    *src_buffer,
   g_return_if_fail (gimp_temp_buf_get_format (paint_buf) == iterator_format);
 
   gimp_parallel_distribute_area (&roi, MIN_PARALLEL_SUB_AREA,
-                                [=] (const GeglRectangle *area)
+                                 [=] (const GeglRectangle *area)
     {
       GeglBufferIterator     *iter;
       GeglRectangle           mask_area = *area;