fix harmless exception if value is null

twister_io.js

@@ -206,9 +206,11 @@ function getFullname( username, item ){
     item.text(username);
     getProfileResource( username, "fullname", undefined, 
                        function(args, value) {
+                           if( value ) {
                                value.replace(/^\s+|\s+$/g, '');
                                if( value.length )
                                    args.item.text(value);
+                           }
                        }, {item: item} );
 }