Moving monsters disturb buried zombies

src/monmove.c

@@ -825,6 +825,8 @@ dochug(register struct monst* mtmp)
             /* if confused grabber has wandered off, let go */
             if (mtmp == u.ustuck && !next2u(mtmp->mx, mtmp->my))
                 unstuck(mtmp);
+            if (grounded(mdat))
+                disturb_buried_zombies(mtmp->mx, mtmp->my);
             /* Maybe it stepped on a trap and fell asleep... */
             if (helpless(mtmp))
                 return 0;