[gtk+] Add GtkEventControllerScroll to the docs

[Matthias Clasen <matthiasc src gnome org>]

commit 7fcd3bee0d3462fdf1c5980f40fc9e4f102d01d8
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Dec 1 14:17:04 2017 -0800

    Add GtkEventControllerScroll to the docs
    
    It is not actually documented yet, unfortunately.

 docs/reference/gtk/gtk4-docs.xml     |    1 +
 docs/reference/gtk/gtk4-sections.txt |   21 +++++++++++++++++++++
 2 files changed, 22 insertions(+), 0 deletions(-)
---
diff --git a/docs/reference/gtk/gtk4-docs.xml b/docs/reference/gtk/gtk4-docs.xml
index 431b15b..a42d7fe 100644
--- a/docs/reference/gtk/gtk4-docs.xml
+++ b/docs/reference/gtk/gtk4-docs.xml
@@ -294,6 +294,7 @@
     <chapter id="Gestures">
       <title>Gestures and event handling</title>
       <xi:include href="xml/gtkeventcontroller.xml" />
+      <xi:include href="xml/gtkeventcontrollerscroll.xml" />
       <xi:include href="xml/gtkgesture.xml" />
       <xi:include href="xml/gtkgesturesingle.xml" />
       <xi:include href="xml/gtkgesturedrag.xml" />
diff --git a/docs/reference/gtk/gtk4-sections.txt b/docs/reference/gtk/gtk4-sections.txt
index afad3de..4a73241 100644
--- a/docs/reference/gtk/gtk4-sections.txt
+++ b/docs/reference/gtk/gtk4-sections.txt
@@ -6741,6 +6741,27 @@ gtk_gesture_single_get_type
 </SECTION>
 
 <SECTION>
+<FILE>gtkeventcontrollerscroll</FILE>
+<TITLE>GtkEventControlerScroll</TITLE>
+GtkEventControllerScroll
+GtkEventControllerScrollFlags
+gtk_event_controller_scroll_new
+gtk_event_controller_scroll_set_flags
+gtk_event_controller_scroll_get_flags
+
+<SUBSECTION Standard>
+GTK_TYPE_EVENT_CONTROLLER_SCROLL
+GTK_EVENT_CONTROLLER_SCROLL
+GTK_EVENT_CONTROLLER_SCROLL_CLASS
+GTK_IS_EVENT_CONTROLLER_SCROLL
+GTK_IS_EVENT_CONTROLLER_SCROLL_CLASS
+GTK_EVENT_CONTROLLER_SCROLL_GET_CLASS
+
+<SUBSECTION Private>
+gtk_event_controller_scroll_get_type
+</SECTION>
+
+<SECTION>
 <FILE>gtkgesturedrag</FILE>
 <TITLE>GtkGestureDrag</TITLE>
 GtkGestureDrag