[gtk] motion controller: Install the properties

[Matthias Clasen <matthiasc src gnome org>]

commit 2b0d1bca43e2638acd33978b8eeff4625d94623f
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Mar 18 08:44:02 2019 -0400

    motion controller: Install the properties
    
    Oops

 gtk/gtkeventcontrollermotion.c | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/gtk/gtkeventcontrollermotion.c b/gtk/gtkeventcontrollermotion.c
index 328ce4f557..38fd81c37f 100644
--- a/gtk/gtkeventcontrollermotion.c
+++ b/gtk/gtkeventcontrollermotion.c
@@ -239,6 +239,8 @@ gtk_event_controller_motion_class_init (GtkEventControllerMotionClass *klass)
                             FALSE,
                             G_PARAM_READABLE);
 
+  g_object_class_install_properties (object_class, NUM_PROPERTIES, props);
+
   /**
    * GtkEventControllerMotion::enter:
    * @controller: The object that received the signal