Merge branch 'master' into jgrpp-beta

# Conflicts:
#	src/saveload/cargopacket_sl.cpp
#	src/saveload/cheat_sl.cpp
#	src/saveload/company_sl.cpp
#	src/saveload/engine_sl.cpp
#	src/saveload/map_sl.cpp
#	src/saveload/order_sl.cpp
#	src/saveload/saveload.cpp
#	src/saveload/saveload.h
#	src/saveload/station_sl.cpp
#	src/saveload/vehicle_sl.cpp
#	src/settings.cpp
#	src/settings_gui.cpp
#	src/settings_internal.h
#	src/stdafx.h
#	src/table/settings/settings.ini
#	src/town_cmd.cpp
#	src/vehicle.cpp

src/pathfinder/npf/npf.cpp

@@ -1043,8 +1043,7 @@ static NPFFoundTargetData NPFRouteInternal(AyStarNode *start1, bool ignore_start
 	_npf_aystar.user_data = user;
 
 	/* GO! */
-	int r = _npf_aystar.Main();
-	(void)r; // assert only
+	[[maybe_unused]] int r = _npf_aystar.Main();
 	assert(r != AYSTAR_STILL_BUSY);
 
 	if (result.best_bird_dist != 0) {