Setting the language 'en' to avoid problems with i18n in LayerSwitcher's tests, (Closes #3345)

git-svn-id: http://svn.openlayers.org/trunk/openlayers@12048 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

tests/Control/LayerSwitcher.html

@@ -3,6 +3,7 @@
   <script src="../OLLoader.js"></script>
   <script type="text/javascript">
     var map; 
+    OpenLayers.Lang.setCode('en');
 
     function test_Control_LayerSwitcher_constructor (t) {
         t.plan( 2 );