[mutter] tests/kms/render: Disconnect signal in end of test case

[Marge Bot <marge-bot src gnome org>]

commit 5be555c59db34d3c11677ba2088cbba418a8d157
Author: Jonas Ådahl <jadahl gmail com>
Date:   Fri May 13 22:08:19 2022 +0200

    tests/kms/render: Disconnect signal in end of test case
    
    Otherwise it'll get invoked in later test cases.
    
    Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2417>

 src/tests/native-kms-render.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)
---
diff --git a/src/tests/native-kms-render.c b/src/tests/native-kms-render.c
index e1a22bf7a2..2f767a4501 100644
--- a/src/tests/native-kms-render.c
+++ b/src/tests/native-kms-render.c
@@ -49,18 +49,22 @@ meta_test_kms_render_basic (void)
   MetaBackend *backend = meta_context_get_backend (test_context);
   ClutterActor *stage = meta_backend_get_stage (backend);
   KmsRenderingTest test;
+  gulong handler_id;
 
   test = (KmsRenderingTest) {
     .number_of_frames_left = 10,
     .loop = g_main_loop_new (NULL, FALSE),
   };
-  g_signal_connect (stage, "after-update", G_CALLBACK (on_after_update), &test);
+  handler_id = g_signal_connect (stage, "after-update",
+                                 G_CALLBACK (on_after_update), &test);
 
   clutter_actor_queue_redraw (CLUTTER_ACTOR (stage));
   g_main_loop_run (test.loop);
   g_main_loop_unref (test.loop);
 
   g_assert_cmpint (test.number_of_frames_left, ==, 0);
+
+  g_signal_handler_disconnect (stage, handler_id);
 }
 
 static void