[gtk/wip/chergert/macos-iosurface] doesnt really matter, but fine to be sure whats going on

[Christian Hergert <chergert src gnome org>]

commit 3e70269a8afd9380a6026307be20c18140f55cf4
Author: Christian Hergert <christian hergert me>
Date:   Fri Feb 11 16:24:53 2022 -0800

    doesnt really matter, but fine to be sure whats going on

 gdk/macos/GdkMacosView.c | 5 +++++
 1 file changed, 5 insertions(+)
---
diff --git a/gdk/macos/GdkMacosView.c b/gdk/macos/GdkMacosView.c
index 66cac30be4..52a55a7cef 100644
--- a/gdk/macos/GdkMacosView.c
+++ b/gdk/macos/GdkMacosView.c
@@ -67,6 +67,11 @@
   [(GdkMacosLayer *)[self layer] setOpaqueRegion:opaqueRegion];
 }
 
+-(BOOL)wantsUpdateLayer
+{
+  return YES;
+}
+
 -(void)swapBuffer:(GdkMacosBuffer *)buffer withDamage:(const cairo_region_t *)damage
 {
   if (self->_nextFrameDirty)