docs: Add missing annotation

diff --git a/gtk/gtkicontheme.c b/gtk/gtkicontheme.c
index 154c9d879492a32a6e64f155c4bfb43a2b81d490..5c8871835643c3db683bb1d4e21ea14dc20847b2 100644 (file)
--- a/gtk/gtkicontheme.c
+++ b/gtk/gtkicontheme.c
@@ -2748,7 +2748,7 @@ add_key_to_hash (gpointer key,
  *
  * Lists the names of icons in the current icon theme.
  *
- * Returns: (element-type utf8) (transfer full): a string array
+ * Returns: (array zero-terminated=1) (element-type utf8) (transfer full): a string array
  *   holding the names of all the icons in the theme. You must
  *   free the array using g_strfreev().
  */