[libgit2-glib] Use g_clear_object

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

commit 1c8ecc0a53238d6deed5a3313a5fe0265947667f
Author: Jesse van den Kieboom <jessevdk gmail com>
Date:   Sat Jun 29 09:47:28 2013 +0200

    Use g_clear_object

 libgit2-glib/ggit-tree-builder.c |    6 +-----
 1 files changed, 1 insertions(+), 5 deletions(-)
---
diff --git a/libgit2-glib/ggit-tree-builder.c b/libgit2-glib/ggit-tree-builder.c
index 5867c16..b677cb7 100644
--- a/libgit2-glib/ggit-tree-builder.c
+++ b/libgit2-glib/ggit-tree-builder.c
@@ -40,11 +40,7 @@ ggit_tree_builder_dispose (GObject *object)
 
        builder = GGIT_TREE_BUILDER (object);
 
-       if (builder->priv->repository)
-       {
-               g_object_unref (builder->priv->repository);
-               builder->priv->repository = NULL;
-       }
+       g_clear_object (&builder->priv->repository);
 
        G_OBJECT_CLASS (ggit_tree_builder_parent_class)->dispose (object);
 }