mozilla/shumway — pull request #763 by Constellation (2013-10-05 20:32:12+00:00)
Title: target argument of MovieClipLoader#loadClip and unloadClip may be level

According to the document[1,2], "target" argument of these methods may
be number (level).

1: http://help.adobe.com/en_US/AS2LCR/Flash_10.0/help.html?content=00001381.html
2: http://help.adobe.com/en_US/AS2LCR/Flash_10.0/help.html?content=00001389.html