set a default EPSG:4326 externalProjection to the KML, OSM and GPX formats. r=pgiraud (closes #2424)

git-svn-id: http://svn.openlayers.org/trunk/openlayers@9975 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

tests/Format/KML.html

@@ -10,7 +10,7 @@
     var test_nl = '<kml xmlns="http://earth.google.com/kml/2.2"> <Document> <NetworkLink> <Link> <href>http://maker.geocommons.com/maps/1717/overlays/0</href> </Link> </NetworkLink> </Document></kml>';
 
     function test_Format_KML_constructor(t) { 
-        t.plan(4); 
+        t.plan(5); 
          
         var options = {'foo': 'bar'}; 
         var format = new OpenLayers.Format.KML(options); 
@@ -19,6 +19,8 @@
         t.eq(format.foo, "bar", "constructor sets options correctly"); 
         t.eq(typeof format.read, "function", "format has a read function"); 
         t.eq(typeof format.write, "function", "format has a write function");
+        t.eq(format.externalProjection.getCode(), "EPSG:4326", 
+             "default external projection is EPSG:4326"); 
     }
 
     function test_Format_KML_read(t) {