[gnome-builder] tree: add notify::selection

[Christian Hergert <chergert src gnome org>]

commit 2f43d91a6181ff33c76dd71cecc785b0fbf5c4ef
Author: Christian Hergert <christian hergert me>
Date:   Wed Apr 8 14:49:10 2015 -0700

    tree: add notify::selection

 src/tree/gb-tree.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/src/tree/gb-tree.c b/src/tree/gb-tree.c
index d8730b4..5637ff3 100644
--- a/src/tree/gb-tree.c
+++ b/src/tree/gb-tree.c
@@ -294,6 +294,8 @@ gb_tree_selection_changed (GbTree           *tree,
         }
     }
 
+  g_object_notify_by_pspec (G_OBJECT (tree), gParamSpecs [PROP_SELECTION]);
+
   IDE_EXIT;
 }