Half/Cutted doors generate in Strongholds

EDIT: Relates to MC-60193

Again, I found this in a 1.8 snapshot, though I don't know if this is fixed, so I'll still report it. So, I was in a Stronghold searching for an Ender Portal, and I found a half/cutted door.

What I expected to happen was...:
A full/normal door would generate.

What actually happened was...:
A half/cutted door generated.

Steps to Reproduce:
1. Find a Stronghold (you can do that with Ender Eyes)
2. Search for a half/cutted door (they are not easy to find)
3. If you found it, then enjoy the half/cutted door.

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Seed: 3268861822896236472
Coords: x: 690, y: 14, z: 309