[gimp] Add missing boilterplate macro

[Michael Natterer <mitch src gnome org>]

commit 17f345fa1a91cbe1ee56d44304d51707e14a8568
Author: Michael Natterer <mitch gimp org>
Date:   Mon Sep 14 21:37:53 2009 +0200

    Add missing boilterplate macro

 app/core/gimpfilteredcontainer.h |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/app/core/gimpfilteredcontainer.h b/app/core/gimpfilteredcontainer.h
index d96c99f..0e5f097 100644
--- a/app/core/gimpfilteredcontainer.h
+++ b/app/core/gimpfilteredcontainer.h
@@ -29,6 +29,7 @@
 #define GIMP_FILTERED_CONTAINER(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_FILTERED_CONTAINER, GimpFilteredContainer))
 #define GIMP_FILTERED_CONTAINER_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_FILTERED_CONTAINER, GimpFilteredContainerClass))
 #define GIMP_IS_FILTERED_CONTAINER(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_FILTERED_CONTAINER))
+#define GIMP_IS_FILTERED_CONTAINER_CLASS(class) (G_TYPE_CHECK_CLASS_TYPE ((class), GIMP_TYPE_FILTERED_CONTAINER))
 #define GIMP_FILTERED_CONTAINER_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), GIMP_TYPE_FILTERED_CONTAINER, GimpFilteredContainerClass))