Fix a client crash when the server was not sending it correct multi-PVs.

diff --git a/www/js/remoteglot.js b/www/js/remoteglot.js
index 1f4c2a5..3568360 100644 (file)
--- a/www/js/remoteglot.js
+++ b/www/js/remoteglot.js
@@ -1208,7 +1208,9 @@ var update_board = function() {
                for (var i = 1; i < alt_moves.length && i < 3; ++i) {
                        hiddenboard = new Chess(base_fen);
                        var move = hiddenboard.move(alt_moves[i]);
-                       create_arrow(move.from, move.to, '#f66', 1, 10);
+                       if (move !== null) {
+                               create_arrow(move.from, move.to, '#f66', 1, 10);
+                       }
                }
        }