[mutter] window: Store tile mode as MetaTileMode

[Jonas Ådahl <jadahl src gnome org>]

commit 5fc07fcc23030fb81c567ae22ee118faab4afa4c
Author: Jonas Ådahl <jadahl gmail com>
Date:   Wed Oct 24 11:54:44 2018 +0200

    window: Store tile mode as MetaTileMode
    
    An unnecessary memory optimization, storing the tile mode as a 2 bit
    unsigned integer, was used. While saving a few bytes, it made debugging
    harder. Remove the useless byte packing.

 src/core/window-private.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/src/core/window-private.h b/src/core/window-private.h
index 78aff9391..c88d1131e 100644
--- a/src/core/window-private.h
+++ b/src/core/window-private.h
@@ -215,7 +215,8 @@ struct _MetaWindow
   guint minimize_after_placement : 1;
 
   /* The current tile mode */
-  guint tile_mode : 2;
+  MetaTileMode tile_mode;
+
   /* The last "full" maximized/unmaximized state. We need to keep track of
    * that to toggle between normal/tiled or maximized/tiled states. */
   guint saved_maximize : 1;