[gnome-builder] app: add missing gb_application_new declaration.

[Christian Hergert <chergert src gnome org>]

commit 2d04b8e8f578d8822c408a8b2fe85ee6f496d05e
Author: Christian Hergert <christian hergert me>
Date:   Tue Sep 9 21:28:21 2014 -0700

    app: add missing gb_application_new declaration.

 src/app/gb-application.h |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/src/app/gb-application.h b/src/app/gb-application.h
index 16dd7bf..0eba00d 100644
--- a/src/app/gb-application.h
+++ b/src/app/gb-application.h
@@ -48,7 +48,8 @@ struct _GbApplicationClass
   GtkApplicationClass parent_class;
 };
 
-GType gb_application_get_type (void) G_GNUC_CONST;
+GbApplication *gb_application_new      (void);
+GType          gb_application_get_type (void) G_GNUC_CONST;
 
 G_END_DECLS