Wipe gridless cache if the wall layout changes

js/pathfinding.js

@@ -47,10 +47,17 @@ export function findPath(from, to, token, previousWaypoints) {
 	}
 }
 
-export function wipePathfindingCache() {
+export function wipeGriddedPathfindingCache() {
 	cachedNodes = undefined;
 }
 
+export function wipeGridlessPathfindingCache() {
+	if (gridlessPathfinder) {
+		GridlessPathfinding.free(gridlessPathfinder);
+		gridlessPathfinder = undefined;
+	}
+}
+
 function getNode(pos, token, initialize=true) {
 	pos = {layer: 0, ...pos}; // Copy pos and set pos.layer to the default value if it's unset
 	if (!cachedNodes)