Explain empty enum value

adminer/include/adminer.inc.php

@@ -423,7 +423,7 @@ document.getElementById('username').focus();
 	function editInput($table, $field, $attrs, $value) {
 		if ($field["type"] == "enum") {
 			return ($field["null"] ? "<label><input type='radio'$attrs value=''" . (isset($value) || isset($_GET["select"]) ? "" : " checked") . "><em>NULL</em></label> " : "")
-				. "<input type='radio'$attrs value='0'" . ($value === 0 ? " checked" : "") . ">"
+				. "<label><input type='radio'$attrs value='0'" . ($value === 0 ? " checked" : "") . "><em>" . lang('empty') . "</em></label>"
 			;
 		}
 		return "";

adminer/lang/cs.inc.php

@@ -257,4 +257,5 @@ $translations = array(
 	'Alter type' => 'Pozměnit typ',
 	'Search data in tables' => 'Vyhledat data v tabulkách',
 	'From server' => 'Ze serveru',
+	'empty' => 'prázdné',
 );