Css: Fix the "sanity check" test

The #dl element has 0 height so it's now considered hidden regardless
of its width.

(cherry-picked from 995f70777ac6c0f988a44807ef1399e73937b2ee)

test/unit/effects.js

@@ -25,7 +25,7 @@ module("effects", {
 
 test("sanity check", function() {
 	expect(1);
-	ok( jQuery("#dl:visible, #qunit-fixture:visible, #foo:visible").length === 3, "QUnit state is correct for testing effects" );
+	equal( jQuery("#dl:visible, #qunit-fixture:visible, #foo:visible").length, 2, "QUnit state is correct for testing effects" );
 });
 
 test("show() basic", 2, function() {