[Adventurer's Dream] [Resourcepack models] Crash on spawning mooshroom when cow model is changed

[alpha 1.1.0.3 332621]

Summary:
When the model of a cow is changed (It is replaced with the bear model).
Simply summoning mooshroom entity will crash the game.
The mooshroom model is not changed.

Impact:Crash when a Mooshroom spawns with the resourcepack of Adventurer's Dream. [Adventurer's Dream]

Repro Steps:
1. Load the texturepack attached to this report
2. Go in a MC world
3. Get a mooshroom egg
4. Use the mooshroom egg

Or

1. Load the mooshroomspawner mcworld
2. Press the button on the commandblock

Observed Results:
Summoning mooshroom entity will crash the game

Assertion failed: Invalid texture coordinates
Condition is false: coord.x >= 0.f && coord.x <= 1.f && coord.y >= 0.f && coord.y <= 1.f
Function: Tessellator::_tex in c:\DarwinWork\10\s\handheld\project\VS2015\Minecraft\Minecraft.Client\..\..\..\..\src-client\common\client\renderer\renderer\Tessellator.cpp @ 157

Expected Results:
No crash

Screenshots/Videos attached: Yes