[gegl] tiff-load: use new iterator API

[Øyvind "pippin" Kolås <ok src gnome org>]

commit 7517e42ed0cb5dee70e74595cca414462ffc1878
Author: Øyvind Kolås <pippin gimp org>
Date:   Mon Sep 24 15:05:10 2018 +0200

    tiff-load: use new iterator API

 operations/external/tiff-load.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)
---
diff --git a/operations/external/tiff-load.c b/operations/external/tiff-load.c
index f94cbc874..3d1b1082e 100644
--- a/operations/external/tiff-load.c
+++ b/operations/external/tiff-load.c
@@ -38,6 +38,8 @@ property_int(directory, _("Directory"), 1)
 #define GEGL_OP_NAME     tiff_load
 #define GEGL_OP_C_SOURCE tiff-load.c
 
+#define GEGL_ITERATOR2_API
+
 #include <gegl-op.h>
 #include <gegl-gio-private.h>
 #include <glib/gprintf.h>
@@ -678,7 +680,7 @@ load_separated(GeglOperation *operation,
               iterator = gegl_buffer_iterator_new(linear, &plane_tile,
                                                   0, NULL,
                                                   GEGL_ACCESS_READ,
-                                                  GEGL_ABYSS_NONE);
+                                                  GEGL_ABYSS_NONE, 2);
 
               gegl_buffer_iterator_add(iterator, output, &output_tile,
                                        0, p->format,
@@ -687,8 +689,8 @@ load_separated(GeglOperation *operation,
 
               while (gegl_buffer_iterator_next(iterator))
                 {
-                  guchar *plane_buffer = iterator->data[0];
-                  guchar *output_buffer = iterator->data[1];
+                  guchar *plane_buffer = iterator->items[0].data;
+                  guchar *output_buffer = iterator->items[1].data;
                   gint nb_pixels = iterator->length;
 
                   output_buffer += offset;