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

[Igor Gnatenko <ignatenko src gnome org>]

commit 9cc746c2a0da07bf625b93601632d657e8032149
Author: Brian C. Lane <bcl redhat com>
Date:   Wed Aug 30 17:14:12 2017 -0700

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

 libgit2-glib/ggit-patch.c |   12 +++++++-----
 1 files changed, 7 insertions(+), 5 deletions(-)
---
diff --git a/libgit2-glib/ggit-patch.c b/libgit2-glib/ggit-patch.c
index 9c14877..ee04e4d 100644
--- a/libgit2-glib/ggit-patch.c
+++ b/libgit2-glib/ggit-patch.c
@@ -53,7 +53,7 @@ _ggit_patch_wrap (git_patch *patch)
  * Atomically increments the reference count of @patch by one.
  * This function is MT-safe and may be called from any thread.
  *
- * Returns: (transfer none): a #GgitPatch.
+ * Returns: (transfer none) (nullable): a #GgitPatch or %NULL.
  */
 GgitPatch *
 ggit_patch_ref (GgitPatch *patch)
@@ -95,7 +95,7 @@ ggit_patch_unref (GgitPatch *patch)
  * done with it.  You can use the patch object to loop over all the hunks
  * and lines in the diff of the one delta.
  *
- * Returns: (transfer full): a newly created #GgitPatch.
+ * Returns: (transfer full) (nullable): a newly created #GgitPatch or %NULL.
  */
 GgitPatch *
 ggit_patch_new_from_diff (GgitDiff  *diff,
@@ -134,6 +134,8 @@ ggit_patch_new_from_diff (GgitDiff  *diff,
  * for the difference instead of directly making callbacks.  You can use the
  * standard ggit_patch accessor functions to read the patch data, and
  * you must call ggit_patch_unref on the patch when done.
+ *
+ * Returns: (transfer full) (nullable): a newly created #GgitPatch or %NULL.
  */
 GgitPatch *
 ggit_patch_new_from_blobs (GgitBlob         *old_blob,
@@ -174,7 +176,7 @@ ggit_patch_new_from_blobs (GgitBlob         *old_blob,
  *
  * Gets the content of a patch as a single diff text.
  *
- * Returns: the content of a patch as a single diff text.
+ * Returns: (transfer full) (nullable): the content of a patch as a single diff text or %NULL.
  */
 gchar *
 ggit_patch_to_string (GgitPatch  *patch,
@@ -370,7 +372,7 @@ ggit_patch_get_num_lines_in_hunk (GgitPatch *patch,
  *
  * Get the diff delta corresponding to the patch.
  *
- * Returns: (transfer full): the #GgitDiffDelta of the patch.
+ * Returns: (transfer full) (nullable): the #GgitDiffDelta of the patch or %NULL.
  */
 GgitDiffDelta *
 ggit_patch_get_delta (GgitPatch *patch)
@@ -388,7 +390,7 @@ ggit_patch_get_delta (GgitPatch *patch)
  *
  * Get the @idx'th hunk in the patch.
  *
- * Returns: (transfer full): a new #GgitDiffHunk or %NULL on error.
+ * Returns: (transfer full) (nullable): a new #GgitDiffHunk or %NULL on error.
  */
 GgitDiffHunk *
 ggit_patch_get_hunk (GgitPatch  *patch,