types/wlr_xdg_output_v1: Fix wl_output.done bug.

If the client binds to version 3 of zxdg_output_v1 and version 1 of
wl_output no wl_output.done event is emitted [1].

Add a version check to output_manager_handle_get_xdg_output so that no
event is emitted and prevents clients bound to version 1 of wl_output
from crashing.

[1]: wayland/wayland-protocols#81

types/wlr_xdg_output_v1.c

@@ -140,7 +140,10 @@ static void output_manager_handle_get_xdg_output(struct wl_client *client,
 
 	output_send_details(xdg_output, xdg_output_resource);
 
-	wl_output_send_done(output_resource);
+	version = wl_resource_get_version(output_resource);
+	if (version >= WL_OUTPUT_DONE_SINCE_VERSION) {
+		wl_output_send_done(output_resource);
+	}
 }
 
 static const struct zxdg_output_manager_v1_interface