[libgsf] Introspection fixes.

[Morten Welinder <mortenw src gnome org>]

commit 97e9424d9224c5b6eab37c92b46a11b4e9ce8d44
Author: Morten Welinder <terra gnome org>
Date:   Mon Jan 27 18:50:49 2020 -0500

    Introspection fixes.

 gsf/gsf-docprop-vector.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)
---
diff --git a/gsf/gsf-docprop-vector.c b/gsf/gsf-docprop-vector.c
index 1571cda..8ae8c0e 100644
--- a/gsf/gsf-docprop-vector.c
+++ b/gsf/gsf-docprop-vector.c
@@ -51,10 +51,11 @@ gsf_value_get_docprop_varray (GValue const *value)
  * gsf_value_get_docprop_array:
  * @value: A GValue of type #GsfDocPropVector.
  *
- * This function returns the array of values inside #GsfDocPropVector or NULL.
+ * This function returns the array of values inside #GsfDocPropVector.
  * No additional references are created.
  *
- * Returns: (transfer none) (element-type GValue): A #GArray of #GValue
+ * Returns: (transfer none) (element-type GValue) (nullable): A #GArray
+ * of #GValue
  **/
 GArray *
 gsf_value_get_docprop_array (GValue const *value)
@@ -111,7 +112,7 @@ gsf_docprop_vector_append (GsfDocPropVector *vector, GValue *value)
  * This function returns a string which represents all the GValues in @vector.
  * The caller is responsible for freeing the result.
  *
- * Returns: a string of comma-separated values
+ * Returns (transfer full): a string of comma-separated values
  **/
 gchar*
 gsf_docprop_vector_as_string (GsfDocPropVector const *vector)