[gtk/wip/chergert/quartz4u] macos: setNeedsDisplay

[Christian Hergert <chergert src gnome org>]

commit 36c7af46898a8689b6fc79290874c4ac5c622fbf
Author: Christian Hergert <chergert redhat com>
Date:   Mon May 18 18:29:34 2020 -0700

    macos: setNeedsDisplay
    
    We did this before, and so we might as well set it immediately still

 gdk/macos/gdkmacossurface.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/gdk/macos/gdkmacossurface.c b/gdk/macos/gdkmacossurface.c
index deb8788fb2..f4d4046af3 100644
--- a/gdk/macos/gdkmacossurface.c
+++ b/gdk/macos/gdkmacossurface.c
@@ -735,6 +735,7 @@ _gdk_macos_surface_show (GdkMacosSurface *self)
   _gdk_surface_update_viewable (GDK_SURFACE (self));
 
   [self->window showAndMakeKey:YES];
+  [[self->window contentView] setNeedsDisplay:YES];
 
   if (!was_mapped)
     {