[gegl] gaussian-blur-iir: disable automatic threading

[Øyvind Kolås <ok src gnome org>]

commit 31af60b0a672796019cc800edb4a5d8d121fe51a
Author: Øyvind Kolås <pippin gimp org>
Date:   Sat Nov 21 03:17:07 2015 +0100

    gaussian-blur-iir: disable automatic threading

 operations/common/gaussian-blur-iir.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/operations/common/gaussian-blur-iir.c b/operations/common/gaussian-blur-iir.c
index d08423a..b4cfe87 100644
--- a/operations/common/gaussian-blur-iir.c
+++ b/operations/common/gaussian-blur-iir.c
@@ -110,6 +110,7 @@ gegl_op_class_init (GeglOpClass *klass)
   operation_class = GEGL_OPERATION_CLASS (klass);
 
   operation_class->attach = attach;
+  operation_class->threaded = FALSE;
 
   gegl_operation_class_set_keys (operation_class,
     "name",        "gegl:gaussian-blur",