[gimp] app: migrate iscissorstool to new iterator api

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

commit beb4ecb2383a49c3928ed4e5a1c4766af47f0951
Author: Øyvind Kolås <pippin gimp org>
Date:   Tue Sep 11 01:33:36 2018 +0200

    app: migrate iscissorstool to new iterator api

 app/tools/gimpiscissorstool.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)
---
diff --git a/app/tools/gimpiscissorstool.c b/app/tools/gimpiscissorstool.c
index abfec2aaf6..67fb62f7ee 100644
--- a/app/tools/gimpiscissorstool.c
+++ b/app/tools/gimpiscissorstool.c
@@ -46,6 +46,7 @@
 
 #include <stdlib.h>
 
+#define GEGL_ITERATOR2_API
 #include <gegl.h>
 #include <gtk/gtk.h>
 #include <gdk/gdkkeysyms.h>
@@ -1914,12 +1915,12 @@ find_max_gradient (GimpIscissorsTool *iscissors,
   iter = gegl_buffer_iterator_new (iscissors->gradient_map,
                                    GEGL_RECTANGLE (x1, y1, x2 - x1, y2 - y1),
                                    0, NULL,
-                                   GEGL_ACCESS_READ, GEGL_ABYSS_NONE);
-  roi = &iter->roi[0];
+                                   GEGL_ACCESS_READ, GEGL_ABYSS_NONE, 1);
+  roi = &iter->items[0].roi;
 
   while (gegl_buffer_iterator_next (iter))
     {
-      guint8 *data = iter->data[0];
+      guint8 *data = iter->items[0].data;
       gint    endx = roi->x + roi->width;
       gint    endy = roi->y + roi->height;
       gint    i, j;