IDL: uint64 or udlong

[Amin Azez]

Grepping of the samba4 source helped me delcare an actual uint64_t by
specifying a udlong.

If I specify uint64 in the idl the pidl generated files try to make use
of "struct uint64" instead of uint64_t

Using udlong sounds like a step towards architecture specific sizes and
makes me uneasy. 

What should I be using in my idl when I want a 64 bit unsigned integer
(for file-offsets in this case)?

Thanks

Sam