[gtk+] Resolving undefined reference to gdk_get_default_root_window

[Emmanuele Bassi <ebassi src gnome org>]

commit edffa8d6edb97b03f3f7170802bfa0fb301b40ec
Author: Andrew Crerar <andrew crerar io>
Date:   Wed Nov 1 12:22:03 2017 -0400

    Resolving undefined reference to gdk_get_default_root_window
    
    https://bugzilla.gnome.org/show_bug.cgi?id=789777

 gdk/broadway/gdkdevice-broadway.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gdk/broadway/gdkdevice-broadway.c b/gdk/broadway/gdkdevice-broadway.c
index b33a847..994309e 100644
--- a/gdk/broadway/gdkdevice-broadway.c
+++ b/gdk/broadway/gdkdevice-broadway.c
@@ -182,7 +182,7 @@ gdk_broadway_device_query_state (GdkDevice        *device,
       GdkWindow *mouse_toplevel;
 
       if (window == NULL)
-        window = gdk_get_default_root_window ();
+        window = gdk_display_get_root_window (gdk_device_get_display (device));
 
       impl = GDK_WINDOW_IMPL_BROADWAY (window->impl);
       toplevel = impl->wrapper;