[gimp] app: argh, a warning went through!

[Jehan <jehanp src gnome org>]

commit 6ceaf144705533b60e7cda4bd0e2b26bc5a94951
Author: Jehan <jehan girinstud io>
Date:   Wed Feb 2 21:32:47 2022 +0100

    app: argh, a warning went through!

 app/widgets/gimpdrawabletreeview.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/app/widgets/gimpdrawabletreeview.c b/app/widgets/gimpdrawabletreeview.c
index f803fe0573..cf78a39cb6 100644
--- a/app/widgets/gimpdrawabletreeview.c
+++ b/app/widgets/gimpdrawabletreeview.c
@@ -336,12 +336,12 @@ gimp_drawable_tree_view_floating_selection_changed (GimpImage            *image,
   item = GIMP_ITEM_TREE_VIEW_GET_CLASS (view)->get_active_item (image);
 
   /*  update button states  */
-  g_signal_handlers_block_by_func (gimp_item_tree_view_get_image (view),
+  g_signal_handlers_block_by_func (gimp_item_tree_view_get_image (GIMP_ITEM_TREE_VIEW (view)),
                                    gimp_drawable_tree_view_floating_selection_changed,
                                    view);
   gimp_container_view_select_item (GIMP_CONTAINER_VIEW (view),
                                    (GimpViewable *) item);
-  g_signal_handlers_unblock_by_func (gimp_item_tree_view_get_image (view),
+  g_signal_handlers_unblock_by_func (gimp_item_tree_view_get_image (GIMP_ITEM_TREE_VIEW (view)),
                                      gimp_drawable_tree_view_floating_selection_changed,
                                      view);