docs: add docs for GtkWidgetAuxInfo

diff --git a/gtk/gtkwidget.h b/gtk/gtkwidget.h
index 72e0c3fdf0a9d450b47707226885330b13cc1f0d..77ece36bf2e35c584589bc949c8bcab6c9543acf 100644 (file)
--- a/gtk/gtkwidget.h
+++ b/gtk/gtkwidget.h
@@ -600,6 +600,15 @@ struct _GtkWidgetClass
   void (*_gtk_reserved7) (void);
 };
 
+/**
+ * GtkWidgetAuxInfo:
+ * @width: the widget's width
+ * @height: the widget's height
+ * @halign: the widget's horizontal alignment
+ * @valign: the widget's horizontal alignment
+ * @margin: the widget's #GtkBorder margins
+ *
+ */
 struct _GtkWidgetAuxInfo
 {
   gint width;