(svn r8424) -Fix

Do not call ClearSlot() just before calling DeleteVehicle(), which does it too

src/roadveh_cmd.cpp

@@ -283,7 +283,6 @@ int32 CmdSellRoadVeh(TileIndex tile, uint32 flags, uint32 p1, uint32 p2)
 		RebuildVehicleLists();
 		InvalidateWindow(WC_COMPANY, v->owner);
 		DeleteWindowById(WC_VEHICLE_VIEW, v->index);
-		ClearSlot(v);
 		DeleteDepotHighlightOfVehicle(v);
 		DeleteVehicle(v);
 		if (IsLocalPlayer()) InvalidateWindow(WC_REPLACE_VEHICLE, VEH_Road);
@@ -512,7 +511,6 @@ static void RoadVehDelete(Vehicle *v)
 	BeginVehicleMove(v);
 	EndVehicleMove(v);
 
-	ClearSlot(v);
 	DeleteVehicle(v);
 }