Terminate all threads when initialization fails

With this the watchdog can correctly terminate VST2 bridges that get
stuck during initialization.

src/wine-host/individual-host.cpp

@@ -108,6 +108,10 @@ __cdecl
                   << std::endl;
         std::cerr << error.what() << std::endl;
 
+        // See below, just returning from `main()` isn't enough to terminate the
+        // process
+        TerminateProcess(GetCurrentProcess(), 0);
+
         return 1;
     }