Filesystem: avoid crashes on exit in case the locale codec is null

On exit, QLocale::codecForLocale() can return null as the codec may have
already been destroyed. In that case, pretend that Latin1 was the
locale, so any file name is acceptable. This matches QString:

    QTextCodec *codec = QTextCodec::codecForLocale();
    if (codec)
        return codec->toUnicode(str, size);
 #endif // textcodec
    return fromLatin1(str, size);

Note that if we're wrong and the locale was *not* Latin1, files that you
had a name to may not be encoded or decoded the same way.

Fixes: QTBUG-78446
Change-Id: Iece6e011237e4ab284ecfffd15c54077728a17ca
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>

0 files changed, 0 insertions, 0 deletions