lxc: fix starting a domain with non-strict numa memory mode
lxc: fix starting a domain with non-strict numa memory mode

 # virsh -c lxc:/// start helloworld
 error: Failed to start domain helloworld
 error: internal error: guest failed to start: Unknown
 failure in libvirt_lxc startup

Return success when there are no cpuset.mems to be set,
instead of failing without setting an error.

Signed-off-by: Ján Tomko <4cab11cfb98d3c937327354a78eb07dbb6ee2bc6@redhat.com>

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