Use QSound instead of QSoundEffect on Qt5

As it was before 1807d0426e,
to avoid issues with QSoundEffect on Qt5

src/Train/TrainSidebar.cpp

@@ -40,7 +40,11 @@
 #include <QKeyEvent>
 #include <QMutexLocker>
 
+#if QT_VERSION >= 0x060000
 #include <QSoundEffect>
+#else
+#include <QSound>
+#endif
 
 // Three current realtime device types supported are:
 #include "RealtimeController.h"
@@ -2078,9 +2082,13 @@ void TrainSidebar::guiUpdate()           // refreshes the telemetry
 
                     if (fPlayAudio) {
                         lapAudioThisLap = false;
+#if QT_VERSION >= 0x060000
                         QSoundEffect effect;
                         effect.setSource(QUrl::fromLocalFile(":audio/lap.wav"));
                         effect.play();
+#else
+                        QSound::play(":audio/lap.wav");
+#endif
                     }
                 }