fix randomized bisect for kite crowns

baumgen.js

@@ -12,7 +12,7 @@ function gen_tree(pos) {
         baum.crown = new KiteCrown(
             70 + Math.random() * 30,
             0.4 + Math.random() * 0.2,
-            0.3 + Math.random() * 0.1,
+            {bisect: 0.2 + Math.random() * 0.2},
         )
     } else {
         baum.crown = new TriangleCrown(