[gitg] Override branch_get_upstream to return a Gitg.Ref

[Jesse van den Kieboom <jessevdk src gnome org>]

commit fb293e8920e1282932e66762ca161d5a56049432
Author: Jesse van den Kieboom <jessevdk gnome org>
Date:   Sat Aug 22 13:54:51 2015 +0200

    Override branch_get_upstream to return a Gitg.Ref

 libgitg/gitg-branch-base.vala |    5 +++++
 libgitg/gitg-branch.vala      |    1 +
 2 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/libgitg/gitg-branch-base.vala b/libgitg/gitg-branch-base.vala
index 8dd5ad9..f94745d 100644
--- a/libgitg/gitg-branch-base.vala
+++ b/libgitg/gitg-branch-base.vala
@@ -32,6 +32,11 @@ public class BranchBase : Ggit.Branch, Ref, Branch
        {
                return (Gitg.Repository)base.get_owner();
        }
+
+       public new Gitg.Ref get_upstream() throws Error
+       {
+               return (Gitg.Ref)base.get_upstream();
+       }
 }
 
 }
diff --git a/libgitg/gitg-branch.vala b/libgitg/gitg-branch.vala
index aa2e756..33ee1c1 100644
--- a/libgitg/gitg-branch.vala
+++ b/libgitg/gitg-branch.vala
@@ -21,6 +21,7 @@ namespace Gitg
 
 public interface Branch : Ggit.Branch, Ref
 {
+       public abstract new Gitg.Ref get_upstream() throws Error;
 }
 
 }