Core tests: Fixed object element for focusable/tabbable tests. Fixes #4488 - :focusable and :tabbable are broken with jQuery 1.3.2.

Author: scottgonzalez

tests/unit/core/core.html

@@ -66,7 +66,7 @@ <h2 id="qunit-userAgent"></h2>
 			<option>option</option>
 		</select>
 		<textarea id="visibleAncestor-textarea">x</textarea>
-		<object id="visibleAncestor-object">xxx</object>
+		<object id="visibleAncestor-object" codebase="about:blank">xxx</object>
 		<a href="#" id="visibleAncestor-anchorWithHref">anchor</a>
 		<a id="visibleAncestor-anchorWithoutHref">anchor</a>
 		<span id="visibleAncestor-span">x</span>