The progress is over the duration time dragging the end point of progress with RTMP streaming

I got the strange phenomenon with RTMP streaming using Red5 server.
This patch is including videojs/video-js-swf#77.

### Description:
Happens on Windows 7 and Ubuntu 12.04LTS.
Seen with IE8, IE9, Firefox 26 Ubuntu,  Chrome32 Ubuntu, Flash 11.2.

1. play streaming with RTMP
2. drag the mouse point the end point of progress or right side of the player
3. the progress is over the duration

I don't know why, but NetStream.time returns milliseconds instead of seconds when I did above according to my debugging.

Reference: 
http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/flash/net/NetStream.html#time

### Expected:
The progress is the same as long as the duration.

### Acutual:
The progress is over the duration like this.

![progress_over_duration1](https://f.cloud.github.com/assets/96569/2117529/856e5a26-90d4-11e3-8cb3-ad0ee65caa2a.png)