qmlviewer tracing blocks system's default message handler on Symbian

@@ -90,11 +92,7 @@ void myMessageOutput(QtMsgType type, const char *msg)

+    if (systemMsgOutput)
+        systemMsgOutput(type, msg);
+
     switch (type) {
     case QtFatalMsg:
         abort();
@@ -523,11 +526,7 @@ QDeclarativeViewer *openFile(const QString &fileName)

 int main(int argc, char ** argv)
 {
-#if defined (Q_OS_SYMBIAN)
-    qInstallMsgHandler(myMessageOutput);
-#else
     systemMsgOutput = qInstallMsgHandler(myMessageOutput);
-#endif