Allow spectating non-living entities

This previously prevented an old bug that no longer exists.

src/main/java/com/laytonsmith/core/functions/PlayerManagement.java

@@ -5509,7 +5509,7 @@ public Mixed exec(Target t, Environment environment, Mixed... args) throws Confi
 			if(args[offset] instanceof CNull) {
 				p.setSpectatorTarget(null);
 			} else {
-				p.setSpectatorTarget(Static.getLivingEntity(args[offset], t));
+				p.setSpectatorTarget(Static.getEntity(args[offset], t));
 			}
 			return CVoid.VOID;
 		}