ACB_ values exceed 16 bits, yet some working variables explicitly declared as uint16

[Luke Howard]

>Ah, at least UF_NO_AUTH_DATA_REQUIRED translates to a 
>
>#define ACB_NO_AUTH_DATA_REQD           0x00080000
>
>I'll look for the others later.

Maybe after a certain value they are just bit shifted?

-- Luke

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