Updated LAV Filters to 0.62-5-2ec84a9 (custom build based on stable version 0.62.0).

Also bump the version check not to accept to use version older than 0.62.0 as internal filters.
Text subtitles: Optimize the parsing speed slightly (~5%).
CDDA Reader: Remove a useless conditional.

A 4-bit field can't hold value greater than 0xf.

Fixes CID 965921.
MPC Audio Render: Mark some member variables as such (cosmetics).
MPC Audio Render: Be more careful when dereferencing pointers.

Fixes CID 965990 and 966169.
CTextFile: Remove a useless check against 0.

Unsigned integers are always greater than or equal to 0 by definition.

Fixes CID 966071.
PlayerCaptureDialog: Don't shadow function argument with local variable.
CDDA Reader: Check index more carefully before using them.

Fixes CID 966205.
Audio CDROM: Ensure the track number is valid before using it.

Fixes CID 1090495.
Simple text subtitles: Mark some helper functions static.
CTextFile: Faster ReadLine by reusing the string buffer when possible.

Around 5% faster.
CTextFile: Buffer the position when possible for faster UTF8 ReadString.

Around 10-15% faster.
Replace ATL regexp by STL regexp.