HarViewer does not give parsing error with the modification.

[harviewer](http://pcapperf.appspot.com/harviewer/index.html) gives error when a har generated by pcap2har([example](https://dl.dropbox.com/u/31703705/shark_dump_all_blocked_normalized.har) is fed to it([example](http://pcapperf.appspot.com/harviewer/index.html?inputUrl=https://dl.dropbox.com/u/31703705/shark_dump_all_blocked_normalized.har), see error in console). 

After the modification, [new har file](https://dl.dropbox.com/u/31703705/shark_dump_all_blocked_normalized%20%281%29.har) and the [harviewer output](http://pcapperf.appspot.com/harviewer/index.html?inputUrl=https://dl.dropbox.com/u/31703705/shark_dump_all_blocked_normalized%20%281%29.har).