Merge pull request #31809 from ShizCalev/helper-cleanup

Cleans up some istypes not using helpers

code/datums/helper_datums/teleport.dm

@@ -206,7 +206,7 @@
 			continue
 
 		if(extended_safety_checks)
-			if(istype(F, /turf/open/lava)) //chasms aren't /floor, and so are pre-filtered
+			if(islava(F)) //chasms aren't /floor, and so are pre-filtered
 				var/turf/open/lava/L = F
 				if(!L.is_safe())
 					continue

code/datums/riding.dm

@@ -261,7 +261,7 @@
 	var/turf/next = get_step(ridden, direction)
 	var/turf/current = get_turf(ridden)
 
-	if(istype(next, /turf/open/lava) || istype(current, /turf/open/lava)) //We can move from land to lava, or lava to land, but not from land to land
+	if(islava(next) || islava(current)) //We can move from land to lava, or lava to land, but not from land to land
 		..()
 	else
 		to_chat(user, "Boats don't go on land!")