wayland: Respect GDK_DISABLE=color-mgmt

If the color-mgmt feature is disabled, don't use the
xx-color-management-v4 protocol.

gdk/wayland/gdkdisplay-wayland.c

@@ -535,7 +535,8 @@ gdk_registry_handle_global (void               *data,
                           &wp_presentation_interface,
                           MIN (version, 1));
     }
-  else if (strcmp (interface, xx_color_manager_v4_interface.name) == 0)
+  else if (strcmp (interface, xx_color_manager_v4_interface.name) == 0 &&
+           gdk_has_feature (GDK_FEATURE_COLOR_MANAGEMENT))
     {
       display_wayland->color = gdk_wayland_color_new (display_wayland, registry, id, version);
     }