Check if custom background is set in template v2

template.php

@@ -13,7 +13,7 @@ function get_total_points($team)
 $scoreUSA = get_total_points('usa');
 $scoreURSS = get_total_points('urss');
 
-if (!$customBackgroundId)
+if (!isset($customBackgroundId))
     $customBackgroundId='';
 ?>