Merge pull request #9376 from hyperlogic/tablet-ui3

Prevent crash when closing the tablet while a sound is playing.

libraries/script-engine/src/TabletScriptingInterface.cpp

@@ -283,7 +283,8 @@ SoundEffect::~SoundEffect() {
         _sound->deleteLater();
     }
     if (_injector) {
-        _injector->deleteLater();
+         // stop will cause the AudioInjector to delete itself.
+        _injector->stop();
     }
 }