[win32] WINFileSMB::Seek() seeking above end of the file is not an error condition
TagLibVFSStream: fix initialization of m_bIsReadOnly
TagLibVFSStream::seek: fix parsing files with broken structure (specified length in header is longer than actual file length)
Merge pull request #4792 from Karlson2k/fix_tag_read

Fix tag reading for some broken files, fixes #15239