Lua: Fix threading related crash

include/IThreaded.h

@@ -8,6 +8,11 @@ public:
     IThreaded()
         // invokes operator() on this object
         : mThread() { }
+        ~IThreaded() noexcept {
+            if (mThread.joinable()) {
+                mThread.join();
+            }
+        }
 
     virtual void Start() final {
         mThread = std::thread([this] { (*this)(); });