[gtk/wip/iainl/pointer-type-casts-3-24] Fix a few overlooked casts

[Iain Lane <iainl src gnome org>]

commit 2326d949e4fb5f1062f0d3de0bb2c940354b47af
Author: Timm Bäder <mail baedert org>
Date:   Sat Dec 9 13:14:00 2017 +0100

    Fix a few overlooked casts
    
    glib warns about these now.
    
    (cherry picked from commit 484e4537807063e2c225f11f2f55f0d04917d356)

 tests/testgmenu.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/tests/testgmenu.c b/tests/testgmenu.c
index c92b1439bc..246a4ed33d 100644
--- a/tests/testgmenu.c
+++ b/tests/testgmenu.c
@@ -103,9 +103,9 @@ get_model (void)
   gtk_builder_add_from_string (builder, menu_markup, -1, &error);
   g_assert_no_error (error);
 
-  menu = g_object_ref (gtk_builder_get_object (builder, "edit-menu"));
+  menu = G_MENU_MODEL (g_object_ref (gtk_builder_get_object (builder, "edit-menu")));
 
-  section = g_object_ref (gtk_builder_get_object (builder, "size-placeholder"));
+  section = G_MENU_MODEL (g_object_ref (gtk_builder_get_object (builder, "size-placeholder")));
   g_object_unref (builder);
 
   for (i = 0.5; i <= 2.0; i += 0.5)