fix PS4 networking support (#20)

gonna mark this a WIP till i test more with large worlds and achievements issues i dont wanna break the PS3 and other builds by enabling it freely,

ideally i can get it to work without it

also i wanna remove the GetLocalIPv4Interfaces auto discovery feature i just did that cause i had so many local networks it got confusing, will remove on Final PR editReviewed-on: #20

Co-authored-by: NaN <nan@str1k3r.xyz>

Minecraft.Client/Common/Network/PlatformNetworkManager.cpp

@@ -477,6 +477,8 @@ bool CPlatformNetworkManagerStub::_RunNetworkGame()
 {
 	extern QNET_STATE _iQNetStubState;
 	_iQNetStubState = QNET_STATE_GAME_PLAY;
+	if (m_pIQNet->IsHost())
+		NetworkSocketLayer::UpdateAdvertiseJoinable(true);
 
 	for (DWORD i = 0; i < IQNet::s_playerCount; i++)
 	{
@@ -698,7 +700,7 @@ void CPlatformNetworkManagerStub::SearchForGames()
 {
 	std::vector<LANSession> lanSessions = NetworkSocketLayer::GetDiscoveredSessions();
 
-	if (g_MultiplayerJoin)
+	if (g_MultiplayerJoin && g_MultiplayerIP[0] != '\0')
 	{
 		bool alreadyPresent = false;
 		for (size_t i = 0; i < lanSessions.size(); i++)