[MC-130639] Fall distance is not updated on the last tick of the fall

The updateFallState does not add -y to the fall distance on the last tick of the block, when the player touches the ground, causing the fall distance to be slightly less than it actually is:

protected void updateFallState(double y, boolean onGroundIn, IBlockState state, BlockPos pos)
{
    if (onGroundIn)
    {
        if (this.fallDistance > 0.0F)
        {
            state.getBlock().onFallenUpon(this.world, pos, this, this.fallDistance);
        }

        this.fallDistance = 0.0F;
    }
    else if (y < 0.0D)
    {
        this.fallDistance = (float)((double)this.fallDistance - y);
    }
}

The "else if (y < 0.0D)" should instead be an if statement and moved to the start of the method.