[gtk/redo-superset] Bring back the reserved bit

[Matthias Clasen <matthiasc src gnome org>]

commit d90e13e0be17a40cf1f2782e42e84d954fd2622b
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Jan 17 11:01:55 2020 -0500

    Bring back the reserved bit

 gtk/gtkcsstypesprivate.h | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/gtk/gtkcsstypesprivate.h b/gtk/gtkcsstypesprivate.h
index 27e1d545f2..5d3c5e3200 100644
--- a/gtk/gtkcsstypesprivate.h
+++ b/gtk/gtkcsstypesprivate.h
@@ -93,6 +93,7 @@ typedef struct _GtkCssStaticStyle GtkCssStaticStyle;
 #define GTK_CSS_CHANGE_TIMESTAMP                      (1ULL << 50)
 #define GTK_CSS_CHANGE_ANIMATIONS                     (1ULL << 51)
 
+#define GTK_CSS_CHANGE_RESERVED_BIT                   (1ULL << 62)
 
 typedef guint64 GtkCssChange;