rendernodes: Add missing nullable annotation

diff --git a/gsk/gskrendernodeimpl.c b/gsk/gskrendernodeimpl.c
index 77c53e264fa3c44e75d0a7f6b0e0cface9ee5887..f7765b72fd1fd852fc9da1e5984bdaa1d6421511 100644 (file)
--- a/gsk/gskrendernodeimpl.c
+++ b/gsk/gskrendernodeimpl.c
@@ -3983,7 +3983,7 @@ static const GskRenderNodeClass GSK_TEXT_NODE_CLASS = {
  * Note that @color may not be used if the font contains
  * color glyphs.
  *
- * Returns: a new text node, or %NULL
+ * Returns: (nullable): a new text node, or %NULL
  */
 GskRenderNode *
 gsk_text_node_new (PangoFont        *font,