Fix issue with AiUpdate

Some plugins like Jabo's needs this thread to be created each time
initiated.

Source/Project64/Plugins/Audio Plugin.cpp

@@ -135,8 +135,13 @@ bool CAudioPlugin::Initiate(CN64System * System, CMainGui * RenderWindow)
 
 	if (System != NULL)
 	{
-		if (AiUpdate && !m_hAudioThread)
+		if (AiUpdate)
 		{ 
+			if (m_hAudioThread)
+			{
+				WriteTraceF(TraceAudio, __FUNCTION__ ": Terminate Audio Thread");
+				TerminateThread(m_hAudioThread, 0);
+			}
 			m_hAudioThread = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)AudioThread, (LPVOID)this, 0, &ThreadID);
 		}