+#if 0
+ printf("::: %d,%d: %d\n", jx, jy-1, Changed[jx][jy-1]);
+#endif
+
+#if 0
+#if 0
+ /* needed to allow change of walkable custom element by entering player */
+ if (!(Changed[jx][jy] & CH_EVENT_BIT(CE_ENTERED_BY_PLAYER)))
+ Changed[jx][jy] = 0; /* allow another change (but prevent loop) */
+#else