No Creative Ender Chests

This mod disables Ender Chests only if a player is in Creative mode. A very specific use case.

But... Why?

Well, long story. I have a server with multiple worlds running, one of the worlds is a test map where players are allowed to use Creative mode and WorldEdit there. Happens that no matter what I do, the Ender Chest inventory is still shared between worlds, enabling players to cheat bringing items from the test creative mode world to the other survival worlds.

This is no more! They can't do that if they can't use the Ender Chest while in Creative mode!

If you find this useful for something else, let me know how!