[libgit2-glib] Add missing annotation

[Ignacio Casal Quinteiro <icq src gnome org>]

commit 9e2744e87a8632109bfe0b72a23cd01e41c22a88
Author: Ignacio Casal Quinteiro <ignacio casal nice-software com>
Date:   Mon Jan 14 22:22:42 2013 +0100

    Add missing annotation

 libgit2-glib/ggit-diff-file.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/libgit2-glib/ggit-diff-file.c b/libgit2-glib/ggit-diff-file.c
index 8723405..72c5d06 100644
--- a/libgit2-glib/ggit-diff-file.c
+++ b/libgit2-glib/ggit-diff-file.c
@@ -100,7 +100,7 @@ ggit_diff_file_unref (GgitDiffFile *file)
  *
  * Gets the #GgitOId for @file.
  *
- * Returns: the file's #GgitOId.
+ * Returns: (transfer none): the file's #GgitOId.
  */
 GgitOId *
 ggit_diff_file_get_oid (GgitDiffFile *file)