Merge branch 'lifetime_profit-sx' into jgrpp

Conflicts:
	src/saveload/afterload.cpp
	src/saveload/extended_ver_sl.cpp
	src/saveload/extended_ver_sl.h
	src/vehicle_gui.cpp

src/vehicle.cpp

@@ -3124,6 +3124,7 @@ 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);
 		}