[gtk/wip/chergert/quartz4u] macos: use new coords when calculating offsets

[Christian Hergert <chergert src gnome org>]

commit 531e5a6bb42ac400feead4a4366bb1045fe81df9
Author: Christian Hergert <chergert redhat com>
Date:   Wed May 20 17:14:15 2020 -0700

    macos: use new coords when calculating offsets

 gdk/macos/gdkmacossurface.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)
---
diff --git a/gdk/macos/gdkmacossurface.c b/gdk/macos/gdkmacossurface.c
index 89419b4029..3aec88dc91 100644
--- a/gdk/macos/gdkmacossurface.c
+++ b/gdk/macos/gdkmacossurface.c
@@ -826,13 +826,13 @@ _gdk_macos_surface_move_resize (GdkMacosSurface *self,
 
   if (GDK_IS_MACOS_SURFACE (surface->parent))
     {
-      surface->x = self->root_x - GDK_MACOS_SURFACE (surface->parent)->root_x;
-      surface->y = self->root_y - GDK_MACOS_SURFACE (surface->parent)->root_y;
+      surface->x = x - GDK_MACOS_SURFACE (surface->parent)->root_x;
+      surface->y = y - GDK_MACOS_SURFACE (surface->parent)->root_y;
     }
   else
     {
-      surface->x = self->root_x;
-      surface->y = self->root_y;
+      surface->x = x;
+      surface->y = y;
     }
 
   _gdk_macos_display_to_display_coords (GDK_MACOS_DISPLAY (display),
@@ -844,7 +844,6 @@ _gdk_macos_surface_move_resize (GdkMacosSurface *self,
 
   if (size_changed)
     gdk_surface_invalidate_rect (surface, NULL);
-
 }
 
 gboolean