Fix typedef in HlsParser
Fix typedef in HlsParser

A parameter was added in the docs, but not the definition.

Change-Id: If0dfa24341450addcd93efa6eb0b24d38d4b8bf1

TheModMaker/shaka-player,TheModMaker/shaka-player,TheModMaker/shaka-player,shaka-project/shaka-player,shaka-project/shaka-player,TheModMaker/shaka-player,tvoli/shaka-player,vimond/shaka-player,vimond/shaka-player,shaka-project/shaka-player,vimond/shaka-player,tvoli/shaka-player,tvoli/shaka-player,shaka-project/shaka-player,tvoli/shaka-player