PHP4 is dead \o/ \o/ \o/ (Part 1, make use of instanceof)

git-svn-id: file:///home/shish/svn/shimmie2/trunk@994 7f39781d-f577-437e-ae19-be835c7a54ca

ext/load_ext_data/main.php

@@ -1,7 +1,7 @@
 <?php
 class LoadExtData extends Extension {
 	public function receive_event($event) {
-		if(is_a($event, 'PageRequestEvent')) {
+		if($event instanceof PageRequestEvent) {
 			global $page, $config;
 
 			$data_href = get_base_href();