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

[Igor Gnatenko <ignatenko src gnome org>]

commit a1b067f5473fc101c8d0be8b9eb00b8ffb8017c5
Author: Brian C. Lane <bcl redhat com>
Date:   Wed Aug 30 12:11:58 2017 -0700

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

 libgit2-glib/ggit-tree.c |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/libgit2-glib/ggit-tree.c b/libgit2-glib/ggit-tree.c
index cd3a41a..29e21c5 100644
--- a/libgit2-glib/ggit-tree.c
+++ b/libgit2-glib/ggit-tree.c
@@ -67,7 +67,7 @@ _ggit_tree_wrap (git_tree *tree,
  *
  * Get the #GgitOId of the tree.
  *
- * Returns: (transfer full): a #GgitOId.
+ * Returns: (transfer full) (nullable): a #GgitOId or %NULL.
  *
  **/
 GgitOId *
@@ -92,7 +92,7 @@ ggit_tree_get_id (GgitTree *tree)
  *
  * Get a tree entry by index.
  *
- * Returns: (transfer full): a #GgitTreeEntry.
+ * Returns: (transfer full) (nullable): a #GgitTreeEntry or %NULL.
  *
  **/
 GgitTreeEntry *
@@ -139,7 +139,7 @@ ggit_tree_size (GgitTree *tree)
  *
  * Get a tree entry by name.
  *
- * Returns: (transfer full): a #GgitTreeEntry.
+ * Returns: (transfer full) (nullable): a #GgitTreeEntry or %NULL.
  *
  **/
 GgitTreeEntry *
@@ -174,7 +174,7 @@ ggit_tree_get_by_name (GgitTree    *tree,
  * Retrieves a tree entry contained in a tree or in any of its subtrees,
  * given its relative path.
  *
- * Returns: (transfer full): a #GgitTreeEntry.
+ * Returns: (transfer full) (nullable): a #GgitTreeEntry or %NULL.
  *
  **/
 GgitTreeEntry *