Occasionally grabs chuncklist.m3u8 instead of playlist.m3u8

[kristofferR]

On a couple of the streams I've tried the extension finds the URL to the first chuncklist.m3u8 file instead of the playlist.m3u8 file (despite it being easily accessible in the source code). This results in the stream ending after the chunck is finished, instead of the next chuncklist being loaded.