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

[Igor Gnatenko <ignatenko src gnome org>]

commit f09b3c9b84a341c1f0dd8abb47c18eefb3b0723a
Author: Brian C. Lane <bcl redhat com>
Date:   Wed Aug 30 16:48:36 2017 -0700

    ggit-index-entry.c: Fix return annotations
    
    Add (nullable) as needed.

 libgit2-glib/ggit-index-entry.c |   10 +++++-----
 1 files changed, 5 insertions(+), 5 deletions(-)
---
diff --git a/libgit2-glib/ggit-index-entry.c b/libgit2-glib/ggit-index-entry.c
index e006d82..0fbc9bf 100644
--- a/libgit2-glib/ggit-index-entry.c
+++ b/libgit2-glib/ggit-index-entry.c
@@ -101,7 +101,7 @@ _ggit_index_entry_new (const gchar *path,
  * Atomically increments the reference count of @entry by one.
  * This function is MT-safe and may be called from any thread.
  *
- * Returns: (transfer none): a #GgitIndexEntry.
+ * Returns: (transfer none) (nullable): a #GgitIndexEntry or %NULL.
  **/
 GgitIndexEntry *
 ggit_index_entry_ref (GgitIndexEntry *entry)
@@ -144,7 +144,7 @@ ggit_index_entry_unref (GgitIndexEntry *entry)
  * Atomically increments the reference count of @entries by one.
  * This function is MT-safe and may be called from any thread.
  *
- * Returns: (transfer none): a #GgitIndexEntries.
+ * Returns: (transfer none) (nullable): a #GgitIndexEntries or %NULL.
  **/
 GgitIndexEntries *
 ggit_index_entries_ref (GgitIndexEntries *entries)
@@ -190,7 +190,7 @@ ggit_index_entries_unref (GgitIndexEntries *entries)
  * Changes to the #GgitIndexEntry will be reflected in the index once written
  * back to disk using ggit_index_write().
  *
- * Returns: (transfer full): a #GgitIndexEntry or %NULL if out of bounds.
+ * Returns: (transfer full) (nullable): a #GgitIndexEntry or %NULL if out of bounds.
  *
  **/
 GgitIndexEntry *
@@ -238,7 +238,7 @@ ggit_index_entries_get_by_index (GgitIndexEntries *entries,
  * file in a merge conflict. The special value -1 can be used to match the first
  * file encountered in any stage.
  *
- * Returns: (transfer full): a #GgitIndexEntry or %NULL if it was not found.
+ * Returns: (transfer full) (nullable): a #GgitIndexEntry or %NULL if it was not found.
  *
  **/
 GgitIndexEntry *
@@ -517,7 +517,7 @@ ggit_index_entry_set_file_size (GgitIndexEntry *entry,
  *
  * Get the oid of the index entry.
  *
- * Returns: the oid.
+ * Returns: (transfer full) (nullable): the oid or %NULL.
  *
  **/
 GgitOId *