QWindowsFontDatabaseBase: Override both fontEngine functions

MinGW-clang gives warning(-as-error) because the overridden function
which is there shadows the other overload, making it inaccessible.

Pick-to: 6.4 6.2
Change-Id: Ie5684b60a13d71966b9741fcfcdacbd37fe0df85
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Reviewed-by: Oliver Wolff <oliver.wolff@qt.io>

src/gui/text/windows/qwindowsfontdatabasebase.cpp

@@ -751,6 +751,13 @@ IDWriteFontFace *QWindowsFontDatabaseBase::createDirectWriteFace(const QByteArra
 }
 #endif // directwrite && direct2d
 
+QFontEngine *QWindowsFontDatabaseBase::fontEngine(const QFontDef &fontDef, void *handle)
+{
+    // This function was apparently not used before, and probably isn't now either,
+    // call the base implementation which just prints that it's not supported.
+    return QPlatformFontDatabase::fontEngine(fontDef, handle);
+}
+
 QFontEngine *QWindowsFontDatabaseBase::fontEngine(const QByteArray &fontData, qreal pixelSize, QFont::HintingPreference hintingPreference)
 {
     QFontEngine *fontEngine = nullptr;

src/gui/text/windows/qwindowsfontdatabasebase_p.h

@@ -53,6 +53,7 @@ public:
     QWindowsFontDatabaseBase();
     ~QWindowsFontDatabaseBase() override;
 
+    QFontEngine *fontEngine(const QFontDef &fontDef, void *handle) override;
     QFontEngine *fontEngine(const QByteArray &fontData, qreal pixelSize, QFont::HintingPreference hintingPreference) override;
 
     static int defaultVerticalDPI();