Confirm bounds check for standard box size in MP4Demux

[Copilot]

Review comment requested verification that the bounds check for size < 8 was present in the MP4 demuxer to prevent integer underflow when calculating box boundaries.

Status

The bounds check is already in place as of commit 789a87e. No changes required.

else if( size<8 )
{
    setParseError( MP4_PARSE_ERROR_INVALID_BOX );
    return;
}
else
{ // payload after size+type
    next = ptr + (size - 8);  // Safe: size >= 8 guaranteed
}

The check validates size >= 8 before the subtraction, preventing underflow when corrupted MP4 data contains invalid box sizes.

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