[gtk+] gdk/wayland: Don't make gtk_shell1 v2 mandatory

[Carlos Garnacho <carlosg src gnome org>]

commit ab5f02771a7bd7161984765623f478a0a97a2b6d
Author: Carlos Garnacho <carlosg gnome org>
Date:   Tue Sep 19 18:30:01 2017 +0200

    gdk/wayland: Don't make gtk_shell1 v2 mandatory
    
    It may result in a protocol error on older mutters, as GTK+ will
    invariably request a higher version than what's available. Make
    GTK+ also accept v1 if it's all the compositor has got.

 gdk/wayland/gdkdisplay-wayland.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gdk/wayland/gdkdisplay-wayland.c b/gdk/wayland/gdkdisplay-wayland.c
index 30f4d43..31e1935 100644
--- a/gdk/wayland/gdkdisplay-wayland.c
+++ b/gdk/wayland/gdkdisplay-wayland.c
@@ -376,7 +376,7 @@ gdk_registry_handle_global (void               *data,
       display_wayland->gtk_shell =
         wl_registry_bind(display_wayland->wl_registry, id,
                          &gtk_shell1_interface,
-                         GTK_SHELL1_VERSION);
+                         MIN (version, GTK_SHELL1_VERSION));
       _gdk_wayland_screen_set_has_gtk_shell (display_wayland->screen);
       display_wayland->gtk_shell_version = version;
     }