Automatically connect the appropriate controllers for netplay.

Source/Core/Core/Src/HW/SI.cpp

@@ -262,6 +262,8 @@ void Init()
 
 		if (Movie::IsRecordingInput() || Movie::IsPlayingInput())
 			AddDevice(Movie::IsUsingPad(i) ?  (Movie::IsUsingBongo(i) ? SIDEVICE_GC_TARUKONGA : SIDEVICE_GC_CONTROLLER) : SIDEVICE_NONE, i);
+		else if (NetPlay::GetNetPlayPtr())
+			AddDevice(NetPlay::IsUsingPad(i) ? SIDEVICE_GC_CONTROLLER : SIDEVICE_NONE, i);
 		else
 			AddDevice(SConfig::GetInstance().m_SIDevice[i], i);
 	}

Source/Core/Core/Src/NetPlay.cpp

@@ -391,3 +391,8 @@ NetPlay* NetPlay::GetNetPlayPtr()
 {
 	return netplay_ptr;
 }
+
+bool NetPlay::IsUsingPad(int pad)
+{
+	return netplay_ptr->m_local_player->pad_map[pad] != -1;
+}

Source/Core/Core/Src/NetPlay.h

@@ -120,6 +120,7 @@ public:
 
 	u8 GetPadNum(u8 numPAD);
 	static NetPlay* GetNetPlayPtr();
+	static bool IsUsingPad(int pad);
 
 protected:
 	//void GetBufferedPad(const u8 pad_nb, NetPad* const netvalues);