[libgit2-glib] ggit-branch.c: Fix return annotations

[Igor Gnatenko <ignatenko src gnome org>]

commit a973aa9bcafe9d9962b354df91474c6180b0f971
Author: Brian C. Lane <bcl redhat com>
Date:   Wed Aug 30 11:18:17 2017 -0700

    ggit-branch.c: Fix return annotations
    
    Add (nullable) where needed.

 libgit2-glib/ggit-branch.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/libgit2-glib/ggit-branch.c b/libgit2-glib/ggit-branch.c
index 85aac89..c77478a 100644
--- a/libgit2-glib/ggit-branch.c
+++ b/libgit2-glib/ggit-branch.c
@@ -85,7 +85,7 @@ ggit_branch_delete (GgitBranch  *branch,
  *
  * Moves/renames an existing branch reference.
  *
- * Returns: (transfer full): the new branch.
+ * Returns: (transfer full) (nullable): the new branch or %NULL.
  **/
 GgitBranch *
 ggit_branch_move (GgitBranch       *branch,
@@ -124,7 +124,7 @@ ggit_branch_move (GgitBranch       *branch,
  *
  * Gets the name of the given local or remote branch.
  *
- * Returns: the name of the given local or remote branch.
+ * Returns: (transfer none) (nullable): the name of the given local or remote branch or %NULL.
  */
 const gchar *
 ggit_branch_get_name (GgitBranch  *branch,
@@ -156,7 +156,7 @@ ggit_branch_get_name (GgitBranch  *branch,
  * Gets the reference supporting the remote tracking branch,
  * given a local branch reference.
  *
- * Returns: (transfer full) (allow-none): the reference supporting the remote tracking branch.
+ * Returns: (transfer full) (nullable): the reference supporting the remote tracking branch or %NULL.
  */
 GgitRef *
 ggit_branch_get_upstream (GgitBranch  *branch,