conf: Fix off-by-one in virDomainDefGetVcpu
conf: Fix off-by-one in virDomainDefGetVcpu

Cpus are indexed starting from '0' so the check was invalid.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1316384
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1316420

nertpinx/libvirt,olafhering/libvirt,jfehlig/libvirt,zippy2/libvirt,fabianfreyer/libvirt,olafhering/libvirt,nertpinx/libvirt,fabianfreyer/libvirt,libvirt/libvirt,crobinso/libvirt,crobinso/libvirt,zippy2/libvirt,zippy2/libvirt,eskultety/libvirt,libvirt/libvirt,nertpinx/libvirt,zippy2/libvirt,eskultety/libvirt,crobinso/libvirt,taget/libvirt,VenkatDatta/libvirt,taget/libvirt,olafhering/libvirt,jardasgit/libvirt,taget/libvirt,taget/libvirt,jardasgit/libvirt,andreabolognani/libvirt,VenkatDatta/libvirt,olafhering/libvirt,jfehlig/libvirt,datto/libvirt,libvirt/libvirt,jfehlig/libvirt,jardasgit/libvirt,datto/libvirt,eskultety/libvirt,fabianfreyer/libvirt,jardasgit/libvirt,andreabolognani/libvirt,andreabolognani/libvirt,jardasgit/libvirt,nertpinx/libvirt,VenkatDatta/libvirt,VenkatDatta/libvirt,andreabolognani/libvirt,datto/libvirt,datto/libvirt,VenkatDatta/libvirt,andreabolognani/libvirt,nertpinx/libvirt,datto/libvirt,jfehlig/libvirt,eskultety/libvirt,fabianfreyer/libvirt,crobinso/libvirt,eskultety/libvirt,taget/libvirt,libvirt/libvirt,fabianfreyer/libvirt