[gtk/wip/chergert/gdk-macos-for-master] macos: disconnect frame clock when destroying surface

[Christian Hergert <chergert src gnome org>]

commit 853a9c7a8c0623d02d509f38f0f8f3507bac28c9
Author: Christian Hergert <chergert redhat com>
Date:   Wed Dec 2 11:35:02 2020 -0800

    macos: disconnect frame clock when destroying surface

 gdk/macos/gdkmacossurface.c | 11 +++++++++++
 1 file changed, 11 insertions(+)
---
diff --git a/gdk/macos/gdkmacossurface.c b/gdk/macos/gdkmacossurface.c
index 2360e1c476..5d6f2e1aaa 100644
--- a/gdk/macos/gdkmacossurface.c
+++ b/gdk/macos/gdkmacossurface.c
@@ -361,6 +361,17 @@ gdk_macos_surface_destroy (GdkSurface *surface,
 
   GdkMacosSurface *self = (GdkMacosSurface *)surface;
   GdkMacosWindow *window = g_steal_pointer (&self->window);
+  GdkFrameClock *frame_clock;
+
+  if ((frame_clock = gdk_surface_get_frame_clock (GDK_SURFACE (self))))
+    {
+      g_signal_handlers_disconnect_by_func (frame_clock,
+                                            G_CALLBACK (gdk_macos_surface_before_paint),
+                                            self);
+      g_signal_handlers_disconnect_by_func (frame_clock,
+                                            G_CALLBACK (gdk_macos_surface_before_paint),
+                                            self);
+    }
 
   g_clear_pointer (&self->title, g_free);