Show borders in tableresize sample even without showborder plugin.

Author: Reinmar

plugins/tableresize/samples/tableresize.html

@@ -47,7 +47,7 @@ <h1 class="samples">
 				CKEditor using the <code>tableresize</code> plugin:
 			</label>
 			<textarea cols="80" id="editor1" name="editor1" rows="10">
-				&lt;table style="width: 500px;"&gt;
+				&lt;table style="width: 500px;" border="1"&gt;
 					&lt;caption&gt;
 						A sample table&lt;/caption&gt;
 					&lt;tbody&gt;