fix

git-svn-id: http://svn.net-core.org/repos/t-engine4@5869 51575b47-30f0-44d4-a5cc-537603b46e54

game/modules/tome/data/general/grids/sand.lua

@@ -60,7 +60,7 @@ newEntity{
 				self.temporary = self.temporary - 1
 				if self.temporary <= 0 then
 					game.level.map(self.x, self.y, engine.Map.TERRAIN, self.old_feat)
-					game.level:removeEntity(self)
+					game.level:removeEntity(self, true)
 					game.logSeen(self, "The unstable sand tunnel collapses!")
 					game.nicer_tiles:updateAround(game.level, self.x, self.y)