(svn r22371) -Fix [FS#4596]: make sure saving has completely and utterly finished before starting a new one. Otherwise you could start a save, which would be marked as done by the previous save stopping and then yet another save could be started... and that could create a deadlock

src/saveload/saveload.cpp

@@ -2420,6 +2420,9 @@ void WaitTillSaved()
 	_save_thread->Join();
 	delete _save_thread;
 	_save_thread = NULL;
+
+	/* Make sure every other state is handled properly as well. */
+	ProcessAsyncSaveFinish();
 }
 
 /**