Core: prevent unnecessary $() rewrapping, re-use local var instead

Author: staabm

src/core.js

@@ -555,7 +555,7 @@ $.extend($.validator, {
 			if ( type === "radio" || type === "checkbox" ) {
 				return $("input[name='" + element.name + "']:checked").val();
 			} else if ( type === "number" && typeof element.validity !== "undefined" ) {
-				return element.validity.badInput ? false : $(element).val();
+				return element.validity.badInput ? false : $element.val();
 			}
 
 			val = $element.val();