[gtk/gtk-3-24] [quartz] Remove extra reference on layer's cairo_surface.

[John Ralls <jralls src gnome org>]

commit 09dd73feeb8acce7d562c1f3d263db991caeacac
Author: John Ralls <jralls ceridwen us>
Date:   Thu Jun 30 15:27:03 2022 -0700

    [quartz] Remove extra reference on layer's cairo_surface.

 gdk/quartz/GdkQuartzView.c    | 2 +-
 gdk/quartz/gdkwindow-quartz.c | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/gdk/quartz/GdkQuartzView.c b/gdk/quartz/GdkQuartzView.c
index d35a0c73f1..af28e37bea 100644
--- a/gdk/quartz/GdkQuartzView.c
+++ b/gdk/quartz/GdkQuartzView.c
@@ -453,7 +453,7 @@ copy_rectangle_argb32 (cairo_surface_t *dest, cairo_surface_t *source,
 
   cairo_surface_destroy (cvpb_surface);
   cairo_region_destroy (bounds_region);
-  _gdk_quartz_unref_cairo_surface (gdk_window);
+  _gdk_quartz_unref_cairo_surface (gdk_window); // reffed in gdk_window_impl_quartz_begin_paint
   CVPixelBufferUnlockBaseAddress (pixels, 0);
   --impl->in_paint_rect_count;
   self.layer.contents = NULL;
diff --git a/gdk/quartz/gdkwindow-quartz.c b/gdk/quartz/gdkwindow-quartz.c
index 9c31f41fd1..9f8534e5c1 100644
--- a/gdk/quartz/gdkwindow-quartz.c
+++ b/gdk/quartz/gdkwindow-quartz.c
@@ -352,7 +352,7 @@ gdk_window_impl_quartz_init (GdkWindowImplQuartz *impl)
 static gboolean
 gdk_window_impl_quartz_begin_paint (GdkWindow *window)
 {
-  gdk_quartz_ref_cairo_surface (window);
+     gdk_quartz_ref_cairo_surface (window); //unreffed in GdkQuartzView::updateLayer
   return FALSE;
 }
 
@@ -1386,6 +1386,7 @@ move_resize_window_internal (GdkWindow *window,
       frame_rect = [impl->toplevel frameRectForContentRect:content_rect];
       [impl->toplevel setFrame:frame_rect display:YES];
       impl->cairo_surface = gdk_quartz_ref_cairo_surface (window);
+      cairo_surface_destroy (impl->cairo_surface); // Remove the extra reference
     }
   else 
     {