Added check, if vehicle is used by server system on /vdestroy

Server/Managers/VehicleManager.cs

@@ -3,6 +3,7 @@ using reallife_gamemode.Server.Entities;
 using System;
 using System.Collections.Generic;
 using System.Text;
+using reallife_gamemode.Model;
 
 namespace reallife_gamemode.Server.Managers
 {
@@ -35,5 +36,21 @@ namespace reallife_gamemode.Server.Managers
 
             return NAPI.Pools.GetAllVehicles().Find(v => v.Handle == _serverVehicles[serverVehicle.Id]);
         }
+
+        public static ServerVehicle GetServerVehicleFromVehicle(Vehicle veh)
+        {
+            using (var dbContext = new DatabaseContext())
+            {
+                foreach(KeyValuePair<int, NetHandle> pair in _serverVehicles)
+                {
+                    if (pair.Value == veh.Handle)
+                    {
+                        return dbContext.ServerVehicles.Find(pair.Key);
+                    }
+                }
+            }
+
+            return null;
+        }
     }
 }