conf: error out on missing dhcp host attributes
conf: error out on missing dhcp host attributes

In virNetworkDHCPHostDefParseXML an error is reported
when partialOkay == true, and none of ip, mac, name
were supplied.

Add the missing goto and error out in this case.

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