#611: let all geometry inherit toString from the superclass - geometry.toString returns well-known text based on Format.WKT.write()

git-svn-id: http://svn.openlayers.org/trunk/openlayers@2945 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Format/WKT.js

@@ -69,6 +69,9 @@ OpenLayers.Format.WKT.prototype =
             }
             geometry = collection[i];
             type = geometry.CLASS_NAME.split('.')[2].toLowerCase();
+            if(!this.extract[type]) {
+                return null;
+            }
             data = this.extract[type].apply(this, [geometry]);
             pieces.push(type.toUpperCase() + '(' + data + ')');
         }