Removed _actions_icnt declaration from local scope in admin JS.

Commit 4523fcd6 introduces _actions_icnt to the local scope,
which overrides the value set in the HTML.

The admin would incorrectly show selected rows in a change list
as "1 of undefined selected".

django/contrib/admin/static/admin/js/actions.js

 (function($) {
-	var _actions_icnt, lastChecked;
+	var lastChecked;
 
 	$.fn.actions = function(opts) {
 		var options = $.extend({}, $.fn.actions.defaults, opts);