From 9c33adf118d10bbc39717b84847d92ce8be64944 Mon Sep 17 00:00:00 2001
From: John Ralls <jralls@ceridwen.us>
Date: Tue, 23 Apr 2019 11:39:17 -0700
Subject: [PATCH] Don't call g_object_ref on NULL, it whines.

Fixes https://gitlab.gnome.org/GNOME/gtk/issues/1822
---
 gdk/quartz/gdkevents-quartz.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/gdk/quartz/gdkevents-quartz.c b/gdk/quartz/gdkevents-quartz.c
index efb6961fa7..8e8f1ef183 100644
--- a/gdk/quartz/gdkevents-quartz.c
+++ b/gdk/quartz/gdkevents-quartz.c
@@ -613,7 +613,10 @@ find_toplevel_under_pointer (GdkDisplay *display,
       gint gdk_x = 0, gdk_y = 0;
       _gdk_quartz_window_nspoint_to_gdk_xy (screen_point, &gdk_x, &gdk_y);
       toplevel = _gdk_quartz_window_find_child (_gdk_root, gdk_x, gdk_y, TRUE);
-      info->toplevel_under_pointer = g_object_ref (toplevel);
+      if (toplevel)
+        info->toplevel_under_pointer = g_object_ref (toplevel);
+      else
+        info->toplevel_under_pointer = NULL;
     }
   if (toplevel)
     {