Import vehicle lifetime profit patch v3

http://www.tt-forums.net/viewtopic.php?p=1161735#p1161735

src/vehicle.cpp

@@ -2657,6 +2657,7 @@ void VehiclesYearlyLoop()
 			}
 
 			v->profit_last_year = v->profit_this_year;
+			v->profit_lifetime += v->profit_this_year;
 			v->profit_this_year = 0;
 			SetWindowDirty(WC_VEHICLE_DETAILS, v->index);
 		}