[gtk/wip/chergert/quartz4u: 78/142] macos: check for valid GdkEvent

[Christian Hergert <chergert src gnome org>]

commit b80d63e2800f5c56996e2e8c909fd86a7d74e3fa
Author: Christian Hergert <chergert redhat com>
Date:   Tue May 19 16:57:30 2020 -0700

    macos: check for valid GdkEvent

 gdk/macos/gdkmacosdisplay-translate.c | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)
---
diff --git a/gdk/macos/gdkmacosdisplay-translate.c b/gdk/macos/gdkmacosdisplay-translate.c
index 636173aa27..aa73e304cc 100644
--- a/gdk/macos/gdkmacosdisplay-translate.c
+++ b/gdk/macos/gdkmacosdisplay-translate.c
@@ -1212,12 +1212,10 @@ _gdk_macos_display_send_button_event (GdkMacosDisplay *self,
   g_return_if_fail (GDK_IS_MACOS_DISPLAY (self));
   g_return_if_fail (nsevent != NULL);
 
-  if (!(surface = find_surface_for_ns_event (self, nsevent, &x, &y)))
-    return;
-
-  event = fill_button_event (self, surface, nsevent, x, y);
-  _gdk_windowing_got_event (GDK_DISPLAY (self),
-                            _gdk_event_queue_append (GDK_DISPLAY (self), event),
-                            event,
-                            0);
+  if ((surface = find_surface_for_ns_event (self, nsevent, &x, &y)) &&
+      (event = fill_button_event (self, surface, nsevent, x, y)))
+    _gdk_windowing_got_event (GDK_DISPLAY (self),
+                              _gdk_event_queue_append (GDK_DISPLAY (self), event),
+                              event,
+                              _gdk_display_get_next_serial (GDK_DISPLAY (self)));
 }