qlocale_win: return null QVariant on failed look-ups

Various functions were still returning a null QString wrapped as a
QVariant; the caller distinguishes these cases, so should get a null
QVariant so it knows the backend failed to answer the query and can
attempt whatever fall-back it may have at its disposal.

Pick-to: 6.2
Change-Id: I0983b9f3b1026f17c3f13ab92b713bee90be466c
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>

1 files changed, 4 insertions, 4 deletions

diff --git a/src/corelib/text/qlocale_win.cpp b/src/corelib/text/qlocale_win.cpp
index a73656440f..38f04d686d 100644
--- a/src/corelib/text/qlocale_win.cpp
+++ b/src/corelib/text/qlocale_win.cpp
@@ -328,7 +328,7 @@ QVariant QSystemLocalePrivate::timeFormat(QLocale::FormatType type)
     case QLocale::NarrowFormat:
         break;
     }
-    return QVariant();
+    return {};
 }
 
 QVariant QSystemLocalePrivate::dateTimeFormat(QLocale::FormatType type)
@@ -382,7 +382,7 @@ QVariant QSystemLocalePrivate::monthName(int month, QLocale::FormatType type)
 
     month -= 1;
     if (month < 0 || month > 11)
-        return QString();
+        return {};
 
     LCTYPE lctype = (type == QLocale::ShortFormat || type == QLocale::NarrowFormat)
             ? short_month_map[month] : long_month_map[month];
@@ -404,7 +404,7 @@ QVariant QSystemLocalePrivate::toString(QDate date, QLocale::FormatType type)
             text = substituteDigits(std::move(text));
         return text;
     }
-    return QString();
+    return {};
 }
 
 QVariant QSystemLocalePrivate::toString(QTime time, QLocale::FormatType type)
@@ -427,7 +427,7 @@ QVariant QSystemLocalePrivate::toString(QTime time, QLocale::FormatType type)
             text = substituteDigits(std::move(text));
         return text;
     }
-    return QString();
+    return {};
 }
 
 QVariant QSystemLocalePrivate::toString(const QDateTime &dt, QLocale::FormatType type)