fix maemo build with QT_USE_FAST_CONCATENATION

src/plugins/qt4projectmanager/qt-maemo/maemodeviceconfigurations.cpp

@@ -48,7 +48,7 @@ namespace Internal {
 QString homeDirOnDevice(const QString &uname)
 {
     const QString &dir = uname == QLatin1String("root")
-        ? QLatin1String("/root")
+        ? QString::fromLatin1("/root")
         : QLatin1String("/home/") + uname;
     qDebug("%s: user name %s is mapped to home dir %s",
            Q_FUNC_INFO, qPrintable(uname), qPrintable(dir));