[gegl] operations/transform: handle collapsed transform nodes in detect

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

commit fc945eca295d1e390e173c693da492b33a3c6249
Author: Øyvind Kolås <pippin gimp org>
Date:   Sun Jan 13 02:48:42 2019 +0100

    operations/transform: handle collapsed transform nodes in detect

 operations/transform/transform-core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/operations/transform/transform-core.c b/operations/transform/transform-core.c
index 87b7b3be8..39beaa60e 100644
--- a/operations/transform/transform-core.c
+++ b/operations/transform/transform-core.c
@@ -831,7 +831,7 @@ gegl_transform_detect (GeglOperation *operation,
       gegl_matrix3_is_identity (&inverse))
     return gegl_operation_detect (source, x, y);
 
-  gegl_transform_create_matrix (transform, &inverse);
+  gegl_transform_create_composite_matrix (transform, &inverse);
   gegl_matrix3_invert (&inverse);
 
   /*