[gtk+] GtkTextView: Small documentation addition

[Matthias Clasen <matthiasc src gnome org>]

commit 5981e1511562d677bc03b702856e7bf110c2cf2b
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat Jun 20 10:33:56 2015 -0400

    GtkTextView: Small documentation addition

 gtk/gtktextview.h |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtktextview.h b/gtk/gtktextview.h
index 91396ba..7917044 100644
--- a/gtk/gtktextview.h
+++ b/gtk/gtktextview.h
@@ -150,6 +150,8 @@ struct _GtkTextView
  *   view is drawing its own text. Applications can override this vfunc
  *   in a subclass to draw customized content underneath or above the
  *   text. Since: 3.14
+ * @extend_selection: The class handler for the #GtkTextView::extend-selection
+ *   signal. Since 3.16
  */
 struct _GtkTextViewClass
 {