add StreamBuilder fix

MediaBrowser.Model/Dlna/StreamBuilder.cs

@@ -1343,7 +1343,7 @@ namespace MediaBrowser.Model.Dlna
 
             if (itemBitrate > requestedMaxBitrate)
             {
-                _logger.Info("Bitrate exceeds " + playMethod + " limit: media bitrate: {0}, max bitrate: {1}", item.Bitrate.Value.ToString(CultureInfo.InvariantCulture), requestedMaxBitrate.ToString(CultureInfo.InvariantCulture));
+                _logger.Info("Bitrate exceeds " + playMethod + " limit: media bitrate: {0}, max bitrate: {1}", itemBitrate.ToString(CultureInfo.InvariantCulture), requestedMaxBitrate.ToString(CultureInfo.InvariantCulture));
                 return false;
             }