fix not removing client when disconnecting them

src/Client.cpp

@@ -74,6 +74,7 @@ void TClient::Disconnect(std::string_view Reason) {
     if (ec) {
         beammp_debugf("Failed to close client socket: {}", ec.message());
     }
+    mServer.RemoveClientById(GetID());
 }
 
 void TClient::SetCarPosition(int Ident, const std::string& Data) {

src/TServer.cpp

@@ -190,6 +190,15 @@ void TServer::RemoveClient(const std::weak_ptr<TClient>& WeakClientPtr) {
     mClients.erase(WeakClientPtr.lock());
 }
 
+void TServer::RemoveClientById(int Id) {
+    auto Client = GetClient(*this, Id);
+    WriteLock Lock(mClientsMutex);
+    if (Client) {
+        Client->ClearCars();
+        mClients.erase(Client);
+    }
+}
+
 void TServer::ForEachClientWeak(const std::function<bool(std::weak_ptr<TClient>)>& Fn) {
     decltype(mClients) Clients;
     {