[gtk+] Add GtkGLArea fully to docs

[Matthias Clasen <matthiasc src gnome org>]

commit 23f6ff3cec19473146c2682bd0b358b2f340c7ff
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun Oct 19 23:30:49 2014 -0400

    Add GtkGLArea fully to docs
    
    It was missing from the type list.

 docs/reference/gtk/gtk3.types.in |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/docs/reference/gtk/gtk3.types.in b/docs/reference/gtk/gtk3.types.in
index be467ff..8f7ff3c 100644
--- a/docs/reference/gtk/gtk3.types.in
+++ b/docs/reference/gtk/gtk3.types.in
@@ -90,6 +90,7 @@ gtk_gesture_rotate_get_type
 gtk_gesture_single_get_type
 gtk_gesture_swipe_get_type
 gtk_gesture_zoom_get_type
+gtk_gl_area_get_type
 gtk_grid_get_type
 gtk_handle_box_get_type
 gtk_hbox_get_type