[libgit2-glib] ggit-submodule-update-options.c: Fix return annotations

[Igor Gnatenko <ignatenko src gnome org>]

commit ba20922bd5665ac2ab00b598718f75d1835647f5
Author: Brian C. Lane <bcl redhat com>
Date:   Wed Aug 30 17:53:25 2017 -0700

    ggit-submodule-update-options.c: Fix return annotations
    
    Add (nullable) as needed.

 libgit2-glib/ggit-submodule-update-options.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/libgit2-glib/ggit-submodule-update-options.c b/libgit2-glib/ggit-submodule-update-options.c
index 94ef550..3a1cd3e 100644
--- a/libgit2-glib/ggit-submodule-update-options.c
+++ b/libgit2-glib/ggit-submodule-update-options.c
@@ -152,7 +152,7 @@ ggit_submodule_update_options_init (GgitSubmoduleUpdateOptions *options)
  *
  * Creates a new submodule options object.
  *
- * Returns: a #GgitSubmoduleUpdateOptions.
+ * Returns: (transfer full) (nullable): a #GgitSubmoduleUpdateOptions or %NULL.
  *
  **/
 GgitSubmoduleUpdateOptions *
@@ -192,7 +192,7 @@ _ggit_submodule_update_options_get_submodule_update_options (GgitSubmoduleUpdate
  *
  * Get the checkout options.
  *
- * Returns: (transfer none): a #GgitCheckoutOptions.
+ * Returns: (transfer none) (nullable): a #GgitCheckoutOptions or %NULL.
  *
  **/
 GgitCheckoutOptions *
@@ -249,7 +249,7 @@ ggit_submodule_update_options_set_checkout_options (GgitSubmoduleUpdateOptions *
  *
  * Gets the fetch options.
  *
- * Returns: (transfer none): a #GgitFetchOptions.
+ * Returns: (transfer none) (nullable): a #GgitFetchOptions or %NULL.
  *
  **/
 GgitFetchOptions *