Fix crash on stop in netplay, and stop netplay when anyone with a pad mapped in game stops emulation.

Source/Core/Core/Src/NetPlayClient.cpp

@@ -564,6 +564,23 @@ bool NetPlayClient::StopGame()
 	return true;
 }
 
+void NetPlayClient::Stop()
+{
+	bool isPadMapped = false;
+	for (unsigned int i = 0; i < 4; ++i)
+	{
+		if (m_pad_map[i] == m_local_player->pid)
+			isPadMapped = true;
+	}
+	// tell the server to stop if we have a pad mapped in game.
+	if (isPadMapped)
+	{
+		sf::Packet spac;
+		spac << (MessageId)NP_MSG_STOP_GAME;
+		m_socket.Send(spac);
+	}
+}
+
 // called from ---CPU--- thread
 u8 NetPlayClient::GetPadNum(u8 numPAD)
 {

Source/Core/Core/Src/NetPlayClient.h

@@ -74,6 +74,7 @@ public:
 
 	bool StartGame(const std::string &path);
 	bool StopGame();
+	void Stop();
 	bool ChangeGame(const std::string& game);
 	void SendChatMessage(const std::string& msg);
 

Source/Core/Core/Src/NetPlayServer.cpp

@@ -376,6 +376,20 @@ unsigned int NetPlayServer::OnData(sf::Packet& packet, sf::SocketTCP& socket)
 		}
 		break;
 
+	case NP_MSG_STOP_GAME:
+		{
+			// tell clients to stop game
+			sf::Packet spac;
+			spac << (MessageId)NP_MSG_STOP_GAME;
+
+			std::lock_guard<std::recursive_mutex> lkp(m_crit.players);
+			std::lock_guard<std::recursive_mutex> lks(m_crit.send);
+			SendToClients(spac);
+
+			m_is_running = false;
+		}
+		break;
+
 	default :
 		PanicAlertT("Unknown message with id:%d received from player:%d Kicking player!", mid, player.pid);
 		// unknown message, kick the client

Source/Core/DolphinWX/Src/NetWindow.cpp

@@ -650,8 +650,6 @@ void PadMapDiag::OnAdjust(wxCommandEvent& event)
 
 void NetPlay::StopGame()
 {
-	if (netplay_server != NULL)
+	if (netplay_client != NULL)
-		netplay_server->StopGame();
+		netplay_client->Stop();
-
-	// TODO: allow non-hosting clients to close the window
 }