[libvirt] Inconsistency with documentation virDomainGetMaxMemory(NULL)

I was making a some test code to checkout some code before I start on my brand new Invite/Tender cluster distribution engine(tm ;) From docs: Retrieve the maximum amount of physical memory allocated to a domain. If domain is NULL, then this get the amount of memory reserved to Domain0 i.e. the domain where the application runs. skinkie@xenapi ~/development/htdocs/cherokee $ ./experiment libvir: Domain error : invalid domain pointer in virDomainGetMaxMemory 0 262144 Code: printf("%ld\n", virDomainGetMaxMemory(NULL)); virDomainPtr domu = virDomainLookupByName(conn, "klant1_gentoo"); printf("%ld\n", virDomainGetMaxMemory(domu)); virDomainFree(domu); Stefan