Fix vehicle state desync when warpPedIntoVehicle is called during onVehicleStartExit (#4458)

Fix vehicle exit process to handle occupant changes correctly

Author: MohabCodeX

Server/mods/deathmatch/logic/CGame.cpp

@@ -3417,6 +3417,9 @@ void CGame::Packet_Vehicle_InOut(CVehicleInOutPacket& Packet)
                                 unsigned int occupiedSeat = pPed->GetOccupiedVehicleSeat();
                                 if (pPed == pVehicle->GetOccupant(occupiedSeat))
                                 {
+                                    // Reset the occupant changed flag before calling the event
+                                    pVehicle->m_bOccupantChanged = false;
+                                    
                                     // Call the exiting vehicle event
                                     CLuaArguments Arguments;
                                     Arguments.PushElement(pPed);                       // player / ped
@@ -3425,12 +3428,23 @@ void CGame::Packet_Vehicle_InOut(CVehicleInOutPacket& Packet)
                                     Arguments.PushNumber(Packet.GetDoor());            // door being used
                                     if (pVehicle->CallEvent("onVehicleStartExit", Arguments) && pPed->GetOccupiedVehicle() == pVehicle)
                                     {
-                                        // Mark him as exiting the vehicle
-                                        pPed->SetVehicleAction(CPed::VEHICLEACTION_EXITING);
+                                        // Check if the occupant was changed during the event (e.g., by warpPedIntoVehicle)
+                                        if (!pVehicle->m_bOccupantChanged)
+                                        {
+                                            // Mark him as exiting the vehicle
+                                            pPed->SetVehicleAction(CPed::VEHICLEACTION_EXITING);
 
-                                        // Tell everyone he can start exiting the vehicle
-                                        CVehicleInOutPacket Reply(PedID, VehicleID, static_cast<unsigned char>(occupiedSeat), VEHICLE_REQUEST_OUT_CONFIRMED, Packet.GetDoor());
-                                        m_pPlayerManager->BroadcastOnlyJoined(Reply);
+                                            // Tell everyone he can start exiting the vehicle
+                                            CVehicleInOutPacket Reply(PedID, VehicleID, static_cast<unsigned char>(occupiedSeat), VEHICLE_REQUEST_OUT_CONFIRMED, Packet.GetDoor());
+                                            m_pPlayerManager->BroadcastOnlyJoined(Reply);
+                                        }
+                                        else
+                                        {
+                                            // Script interfered with the exit process
+                                            // Don't proceed with the exit, send failure response
+                                            CVehicleInOutPacket Reply(PedID, VehicleID, 0, VEHICLE_ATTEMPT_FAILED);
+                                            pPlayer->Send(Reply);
+                                        }
                                     }
                                     else
                                     {