qlocale_win.cpp: distinguish empty QString from null QVariant

An empty string, when packaged as a QVariant, is non-null (as a
QVariant); and QSystemLocale::query()'s callers care about the
difference.

Some callers of the internal getLocaleInfo(LCTYPE type, int maxlen)
need an actual QString return, while others are what query() returns,
so need to return a QVariant; where the former want an empty string,
the latter need a null QVariant. So make that getLocaleInfo() into a
template, so callers can chose QString or QVariant as return type,
only affecting the failure returns.

Change-Id: I7b9a698badedc0e0d8aef8c6e85c22931c33297a
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>

0 files changed, 0 insertions, 0 deletions