fix expired vehicle error

ReallifeGamemode.Client/core/rage-mp/entities.ts

@@ -203,26 +203,50 @@ class RageVehicle extends RageEntity implements IVehicle {
     }
 
     isSeatFree(seat: VehicleSeat): boolean {
+        if (!mp.vehicles.exists(this.vehicle)) {
+            return false;
+        }
+
         return this.vehicle.isSeatFree(<number>seat - 1);
     }
 
     setEngineStatus(status: boolean, instantly: boolean, otherwise: boolean) {
+        if (!mp.vehicles.exists(this.vehicle)) {
+            return false;
+        }
+
         this.vehicle.setEngineOn(status, instantly, otherwise);
     }
 
     setUndriveable(status: boolean) {
+        if (!mp.vehicles.exists(this.vehicle)) {
+            return false;
+        }
+
         this.vehicle.setUndriveable(status);
     }
 
     setDoorsLocked(state: boolean) {
+        if (!mp.vehicles.exists(this.vehicle)) {
+            return false;
+        }
+
         this.vehicle.setDoorsLocked(state ? 2 : 1);
     }
 
     setDoorOpen(door: number, loose: boolean, instantly: boolean) {
+        if (!mp.vehicles.exists(this.vehicle)) {
+            return false;
+        }
+
         this.vehicle.setDoorOpen(door, loose, instantly);
     }
 
     setDoorShut(door: number, instantly: boolean) {
+        if (!mp.vehicles.exists(this.vehicle)) {
+            return false;
+        }
+
         this.vehicle.setDoorShut(door, instantly);
     }
 }