[1.7.10] Custom EnumCreatureType functional?

Hello all,

I know that there were a few topics back for 1.7.2 that covered there being an error with using custom creature types, and I was just wondering if this was fixed for 1.7.10, because I keep getting a null point exception when trying to start up the game with a custom creature type.

For reference, I'm declaring it as

public static final EnumCreatureType testSub = EnumHelper.addCreatureType("TestSubject", EntityTestSubject.class, 10, Material.air, true, true);

And then of course sticking it into correct parameter for EntityRegistry.addSpawn

Not sure if there are still some errors with the code, or if I have done something wrong. Is there a certain place I should be declaring the creature type at? I've just been doing it in my main file.

Thanks for any help you may be able to provide!