[gnome-builder] tab: use single bit for boolean

[Christian Hergert <chergert src gnome org>]

commit 7726392c7d5d95c107355a0f598119275f48a9e8
Author: Christian Hergert <christian hergert me>
Date:   Mon Dec 1 19:55:11 2014 -0800

    tab: use single bit for boolean

 src/tabs/gb-tab.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/src/tabs/gb-tab.c b/src/tabs/gb-tab.c
index d9555d9..d2d2e57 100644
--- a/src/tabs/gb-tab.c
+++ b/src/tabs/gb-tab.c
@@ -28,7 +28,8 @@ struct _GbTabPrivate
 
   gchar    *icon_name;
   gchar    *title;
-  gboolean  dirty;
+
+  guint     dirty : 1;
 };
 
 enum {