(svn r22625) -Fix (r22050)[FS#4642]: Do not zero the orders of disaster vehicles when converting savegames.

src/saveload/vehicle_sl.cpp

@@ -336,7 +336,7 @@ void AfterLoadVehicles(bool part_of_load)
 		if (IsSavegameVersionBefore(160)) {
 			/* In some old savegames there might be some "crap" stored. */
 			FOR_ALL_VEHICLES(v) {
-				if (!v->IsPrimaryVehicle()) {
+				if (!v->IsPrimaryVehicle() && v->type != VEH_DISASTER) {
 					v->current_order.Free();
 					v->unitnumber = 0;
 				}