--- src/monsters.c.orig	2012-07-06 19:29:35.000000000 +0200

+++ src/monsters.c	2015-08-19 23:52:50.496120000 +0200

@@ -2725,6 +2725,11 @@ static position monster_move_serve(monst

             map_path_element *pe = g_queue_pop_head(path->path);

             npos = pe->pos;

         }

+        else

+        {

+            /* ensure npos is initialized */

+            npos = m->pos;

+        }

         if (path != NULL)

             map_path_destroy(path);

--- src/player.c.orig	2012-07-06 19:29:35.000000000 +0200

+++ src/player.c	2015-08-19 23:56:03.671153000 +0200

@@ -1605,6 +1605,11 @@ int player_map_enter(player *p, map *l, 

         else

             pos = map_find_sobject(l, LS_STAIRSUP);

     }

+    /* doing nothing? */

+    else

+    {

+        pos = p->pos;

+    }

     if (l->nlevel == 0)

     {