request_queue may not have anything in it on return from ExecuteCommand

i.e. when calling ES_Launch and everything is reset.

Don't call Update after queuing a request.

Source/Core/Core/Src/HW/WII_IPC.cpp

@@ -212,8 +212,11 @@ void Write32(const u32 _Value, const u32 _Address)
 		_dbg_assert_msg_(WII_IPC, 0, "w32 %08x @ %08x", _Value, _Address);
 		break;
 	}	
-
-	//WII_IPC_HLE_Interface::Update();
+	
+	if((_Address & 0xFFFF) != IPC_PPCCTRL)
+	{
+		WII_IPC_HLE_Interface::Update();	
+	}
 	CoreTiming::ScheduleEvent_Threadsafe(0, updateInterrupts, 0);
 }
 

Source/Core/Core/Src/IPC_HLE/WII_IPC_HLE.cpp

@@ -566,7 +566,8 @@ void Update()
 		INFO_LOG(WII_IPC_HLE, "||-- Acknowledge IPC Request @ 0x%08x", request_queue.front());
 
 		ExecuteCommand(request_queue.front());
-		request_queue.pop_front();
+		if(request_queue.size())
+			request_queue.pop_front();
 
 #if MAX_LOGLEVEL >= DEBUG_LEVEL
 		Dolphin_Debugger::PrintCallstack(LogTypes::WII_IPC_HLE, LogTypes::LDEBUG);