[gegl] affine: revert functional change in commit 7320d0

[Øyvind Kolås <ok src gnome org>]

commit 0fc9cf7be1eef6511d26b2c26dec9153c26b3bd0
Author: �yvind Kolås <pippin gimp org>
Date:   Mon Mar 22 00:19:31 2010 +0000

    affine: revert functional change in commit 7320d0
    
    This makes GEGLs pass make check, but might reintroduce the issues
    faced in Bug 609869 in GIMP - Invalid position of layer content when
    using GEGL. The coding style fixes are kept.

 operations/affine/affine.c |    7 +++----
 1 files changed, 3 insertions(+), 4 deletions(-)
---
diff --git a/operations/affine/affine.c b/operations/affine/affine.c
index 840f499..3908112 100644
--- a/operations/affine/affine.c
+++ b/operations/affine/affine.c
@@ -472,9 +472,8 @@ gegl_affine_get_bounding_box (GeglOperation *op)
   if (gegl_operation_source_get_bounding_box (op, "input"))
     in_rect = *gegl_operation_source_get_bounding_box (op, "input");
 
-  gegl_affine_create_matrix (affine, affine->matrix);
-
-  gegl_matrix3_copy (matrix, affine->matrix);
+  gegl_matrix3_identity (matrix);
+  gegl_affine_create_matrix (affine, matrix);
 
   if (affine->origin_x || affine->origin_y)
     gegl_matrix3_originate (matrix, affine->origin_x, affine->origin_y);
@@ -510,7 +509,7 @@ gegl_affine_get_bounding_box (GeglOperation *op)
   have_points [7] = in_rect.y + in_rect.height ;
 
   for (i = 0; i < 8; i += 2)
-    gegl_matrix3_transform_point (affine->matrix,
+    gegl_matrix3_transform_point (matrix,
                              have_points + i, have_points + i + 1);
 
   gegl_affine_bounding_box (have_points, 4, &have_rect);