Fix notices

Sources/ModSettings.php

@@ -469,6 +469,7 @@ function displaySettings(&$config_vars)
 	// 0: type, 1: name, 2:desc, 3:helptext, 4:size/values.
 	foreach ($config_vars as $k => $config_var)
 	{
+		if (empty($config_var)) continue;
 		if ($display)
 			$context['raw_data'] .= '
 						</tr>';