*A temp fix of the crashes caused by corpses.

--HG--
branch : trunk

src/game/ObjectGridLoader.cpp

@@ -177,6 +177,10 @@ void LoadHelper(CellCorpseSet const& cell_corpses, CellPair &cell, CorpseMapType
         if(!obj)
             continue;
 
+        // TODO: this is a hack
+        // corpse's map should be reset when the map is unloaded
+        obj->SetMap(map);
+
         AddObjectHelper(cell, m, count, map, obj);
     }
 }