Qt5: 'QString::null' is deprecated: use QString() [-Wdeprecated-declarations]

src/Mod/TechDraw/Gui/Command.cpp

@@ -1020,7 +1020,7 @@ void CmdTechDrawSymbol::activated(int iMsg)
 
     // Reading an image
     QString filename = Gui::FileDialog::getOpenFileName(Gui::getMainWindow(), 
-        QObject::tr("Choose an SVG file to open"), QString::null,
+        QObject::tr("Choose an SVG file to open"), QString(),
         QString::fromLatin1("%1 (*.svg *.svgz);;%2 (*.*)").
         arg(QObject::tr("Scalable Vector Graphic")).
         arg(QObject::tr("All Files")));