[gimp] app: switch to #ifdef GEGL_BUG_645810_SOLVED code.

[Jehan Pagès <jehanp src gnome org>]

commit 2956cde6cfb8024bc0a313e652a7a49f493e1294
Author: Jehan <jehan girinstud io>
Date:   Mon Feb 12 19:23:08 2018 +0100

    app: switch to #ifdef GEGL_BUG_645810_SOLVED code.
    
    When checking the Cage Transform operation code, I saw some ifdef meant
    to be switched to when bug 645810 is fixed. It also says in a comment:
    > /* When Gegl bug #645810 will be solved,
    >    this should be a good optimisation */
    Checking said bug, it appears it has been fixed since 2012!
    I also fixed a bit the parameters in gegl_buffer_sample() call since it
    seems the function signature has changed quite a bit.

 app/operations/gimpoperationcagetransform.c |   16 ++--------------
 1 files changed, 2 insertions(+), 14 deletions(-)
---
diff --git a/app/operations/gimpoperationcagetransform.c b/app/operations/gimpoperationcagetransform.c
index fa17e13..98a371f 100644
--- a/app/operations/gimpoperationcagetransform.c
+++ b/app/operations/gimpoperationcagetransform.c
@@ -545,20 +545,8 @@ gimp_cage_transform_compute_destination (GimpCageConfig *config,
   gint           i;
   GimpCagePoint *point;
 
-  /* When Gegl bug #645810 will be solved, this should be a good optimisation */
-  #ifdef GEGL_BUG_645810_SOLVED
-    gegl_buffer_sample (coef_buf, coords.x, coords.y, 1.0, coef, format_coef, GEGL_INTERPOLATION_NEAREST);
-  #else
-    GeglRectangle  rect;
-
-    rect.height = 1;
-    rect.width  = 1;
-    rect.x      = coords.x;
-    rect.y      = coords.y;
-
-    gegl_buffer_get (coef_buf, &rect, 1.0, format_coef, coef,
-                     GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
-  #endif
+  gegl_buffer_sample (coef_buf, coords.x, coords.y, NULL, coef, format_coef,
+                      GEGL_SAMPLER_NEAREST, GEGL_ABYSS_NONE);
 
   for (i = 0; i < n_cage_vertices; i++)
     {