Fix broken formatting on OOM in xenFormatXM
Fix broken formatting on OOM in xenFormatXM

If an OOM occurs when xenFormatXM is setting the 'hpet'
variable it is silently ignored. Fix it to propagate
to the callers.

Signed-off-by: Daniel P. Berrange <bb938cf255e055ff3507f2627d214e8e62118fcf@redhat.com>

nertpinx/libvirt,zhlcindy/libvirt-1.1.4-maintain,jfehlig/libvirt,crobinso/libvirt,cbosdo/libvirt,jardasgit/libvirt,agx/libvirt,libvirt/libvirt,agx/libvirt,eskultety/libvirt,elmarco/libvirt,zippy2/libvirt,zhlcindy/libvirt-1.1.4-maintain,shugaoye/libvirt,shugaoye/libvirt,jardasgit/libvirt,elmarco/libvirt,jardasgit/libvirt,shugaoye/libvirt,VenkatDatta/libvirt,rlaager/libvirt,jardasgit/libvirt,andreabolognani/libvirt,elmarco/libvirt,rlaager/libvirt,shugaoye/libvirt,olafhering/libvirt,fabianfreyer/libvirt,elmarco/libvirt,eskultety/libvirt,datto/libvirt,agx/libvirt,rlaager/libvirt,eskultety/libvirt,taget/libvirt,taget/libvirt,datto/libvirt,andreabolognani/libvirt,zippy2/libvirt,eskultety/libvirt,fabianfreyer/libvirt,jfehlig/libvirt,nertpinx/libvirt,libvirt/libvirt,andreabolognani/libvirt,rlaager/libvirt,datto/libvirt,taget/libvirt,cbosdo/libvirt,datto/libvirt,eskultety/libvirt,cbosdo/libvirt,olafhering/libvirt,nertpinx/libvirt,jfehlig/libvirt,zhlcindy/libvirt-1.1.4-maintain,fabianfreyer/libvirt,nertpinx/libvirt,shugaoye/libvirt,libvirt/libvirt,olafhering/libvirt,agx/libvirt,zippy2/libvirt,zhlcindy/libvirt-1.1.4-maintain,jardasgit/libvirt,cbosdo/libvirt,jfehlig/libvirt,crobinso/libvirt,nertpinx/libvirt,VenkatDatta/libvirt,fabianfreyer/libvirt,cbosdo/libvirt,rlaager/libvirt,VenkatDatta/libvirt,andreabolognani/libvirt,elmarco/libvirt,datto/libvirt,olafhering/libvirt,taget/libvirt,VenkatDatta/libvirt,agx/libvirt,zhlcindy/libvirt-1.1.4-maintain,fabianfreyer/libvirt,taget/libvirt,crobinso/libvirt,crobinso/libvirt,zippy2/libvirt,andreabolognani/libvirt,VenkatDatta/libvirt,libvirt/libvirt