HLS parser bug

[clitic]

Thanks for fixing, but there is another problem with this kind of m3u8 links:

`vsd save "https://play-edge.itunes.apple.com/WebObjects/MZPlayLocal.woa/hls/subscription/playlist.m3u8?cc=US&svcId=tvs.vds.4105&a=1825464056&isExternal=true&brandId=tvs.sbd.4000&id=1163119189&l=en-US&aec=UHD" --keys "000000004553ca556336202020202020:3a51288cc6f07d603249541763f5ca3b;000000004553ca556334202020202020:3f4ebfd27ef4b4675609e4e9825c2b42;000000004553ca556331202020202020:97342fd9b28161dc40e98ed6853a1f7e;000000004553ca556333202020202020:5ad90c3677bc5d33c2ec6540171a82d5;000000004553ca556330202020202020:0f416bab0f7278d4c6e40f083325527f;000000004553ca556335202020202020:82d3f96ea1c216445d5ecffc85668120;000000004553ca556332202020202020:d00ef782dd94d9c68255a5633e8e5a16" -o "XXX.mkv"

thread 'main' panicked at vsd/src/hls/playlist.rs:60:51: called Result::unwrap() on an Err value: ParseFloatError { kind: Invalid } note: run with RUST_BACKTRACE=1 environment variable to display a backtrace`

Originally posted by @spn126 in #54