librpc/ndr use hyper for uid_t/gid_t rather than udlong

[Volker Lendecke]

On Thu, Mar 10, 2011 at 07:53:34AM +1100, Andrew Bartlett wrote:
> Do you have a counter-example I should be aware of?  I'm happy to change
> this (again) if required. 

"man 2 chown":

If the owner or group is specified as -1, then that ID is
not changed.

Volker

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