qemu: qemuDomainGetStatsVcpu: Fix output for possible sparse vCPU settings
qemu: qemuDomainGetStatsVcpu: Fix output for possible sparse vCPU settings

qemuDomainHelperGetVcpus would correctly return an array of
virVcpuInfoPtr structs for online vcpus even for sparse topologies, but
the loop that fills the returned typed parameters would number the vcpus
incorrectly. Fortunately sparse topologies aren't supported yet.

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