Add missing allow-none for set_style_pseudo_class

https://bugzilla.gnome.org/show_bug.cgi?id=599442

diff --git a/src/st/st-widget.c b/src/st/st-widget.c
index 2570ac62c652f5e76e64e680ceebc295d3b3f87a..c2488ecb15ef26d8b7bb27f64d0874c0ffbb2234 100644 (file)
--- a/src/st/st-widget.c
+++ b/src/st/st-widget.c
@@ -1052,7 +1052,7 @@ st_widget_get_style_pseudo_class (StWidget *actor)
 /**
  * st_widget_set_style_pseudo_class:
  * @actor: a #StWidget
- * @pseudo_class: a new pseudo class string
+ * @pseudo_class: (allow-none): a new pseudo class string
  *
  * Set the style pseudo class
  */