[gegl] buffer: enable #if 0'd out COW path

[Øyvind Kolås <ok src gnome org>]

commit 732291bffaa810ccbd2cc298ccd595b031d9d5b9
Author: Øyvind Kolås <pippin gimp org>
Date:   Sat Feb 13 18:31:14 2016 +0100

    buffer: enable #if 0'd out COW path
    
    The buffer tile backends - if that was where the problem was; it might be fixed
    now.
    https://bugzilla.gnome.org/show_bug.cgi?id=696817

 gegl/buffer/gegl-buffer-access.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/gegl/buffer/gegl-buffer-access.c b/gegl/buffer/gegl-buffer-access.c
index 75a50fa..d49e6aa 100644
--- a/gegl/buffer/gegl-buffer-access.c
+++ b/gegl/buffer/gegl-buffer-access.c
@@ -1809,7 +1809,7 @@ gegl_buffer_clear (GeglBuffer          *dst,
       dst_rect = gegl_buffer_get_extent (dst);
     }
 
-#if 0
+#if 1
   /* cow for clearing is currently broken */
   if (!g_object_get_data (G_OBJECT (dst), "is-linear"))
     {
@@ -1858,7 +1858,7 @@ gegl_buffer_clear (GeglBuffer          *dst,
                 dtx = gegl_tile_indice (dst_x, tile_width);
                 dty = gegl_tile_indice (dst_y, tile_height);
 
-                if(gegl_tile_source_void ((GeglTileSource*)dst, dtx, dty, 0));
+                gegl_tile_source_void ((GeglTileSource*)dst, dtx, dty, 0);
               }
           }