Fix broken vector-simple debug/testbed page

`Uncaught TypeError: Cannot read property 'intersects' of undefined`, so rearrange order for an earlier `map.setView()`

debug/vector/vector-simple.html

@@ -17,6 +17,8 @@
 
 	<script>
 		var map = L.map('map');
+		
+		map.setView([51.505, -0.09], 13);
 
 		var marker = L.marker([51.5, -0.09])
 			.bindPopup("<b>Hello world!</b><br />I am a popup.")
@@ -33,8 +35,6 @@
 			.bindPopup("I am a polygon.")
 			.addTo(map);
 
-		map.setView([51.505, -0.09], 13);
-
 		var osmUrl = 'http://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png',
 			osmAttrib = '&copy; <a href="http://openstreetmap.org/copyright">OpenStreetMap</a> contributors',
 			osm = L.tileLayer(osmUrl, {maxZoom: 18, attribution: osmAttrib}).addTo(map);