This fixes a problem where objects that leave the scene were not being removed from thee scene. Projectiles and enemies now get removed when they leave the scene. There should no longer be a segfault when you destroy the final boss.

<?fife type="object"?>
<object id="goldstack" namespace="http://www.fifengine.de/xml/rpg" blocking="0" static="1">
	<image source="000.png" direction="0" />
</object>