[gitg] Missing end_header call

[Ignacio Casal Quinteiro <icq src gnome org>]

commit 6de7863af43d752afe0a253d5e5b77e5e0a0cdba
Author: Ignacio Casal Quinteiro <icq gnome org>
Date:   Wed Oct 17 14:15:08 2012 +0200

    Missing end_header call

 plugins/history/gitg-history-navigation.vala |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/plugins/history/gitg-history-navigation.vala b/plugins/history/gitg-history-navigation.vala
index 1897662..8704c16 100644
--- a/plugins/history/gitg-history-navigation.vala
+++ b/plugins/history/gitg-history-navigation.vala
@@ -195,6 +195,8 @@ namespace GitgHistory
 				             null,
 				             (nc) => ref_activated(it));
 			}
+
+			model.end_header();
 		}
 
 		public List<Gitg.Ref> all