qemu: Improve error if setmem fails for lacking of balloon support
qemu: Improve error if setmem fails for lacking of balloon support

"cannot set memory of an active domain" is misleading, it sounds
like setting memory of active domain is not supported.

wiedi/libvirt,jfehlig/libvirt,wiedi/libvirt,olafhering/libvirt,wiedi/libvirt,libvirt/libvirt,novel/fbsd-libvirt,rmarwaha/libvirt,emaste/libvirt,nertpinx/libvirt,dumbbell/libvirt,shugaoye/libvirt,andreabolognani/libvirt,bjzhang/libvirt,cbosdo/libvirt,crobinso/libvirt,novel/fbsd-libvirt,rlaager/libvirt,datto/libvirt,fabianfreyer/libvirt,shugaoye/libvirt,eskultety/libvirt,elmarco/libvirt,libvirt/libvirt,VenkatDatta/libvirt,zhlcindy/libvirt-1.1.4-maintain,trainstack/libvirt,shugaoye/libvirt,jardasgit/libvirt,jeckersb/libvirt,agx/libvirt,rmarwaha/libvirt1,rmarwaha/libvirt1,elmarco/libvirt,elmarco/libvirt,iam-TJ/libvirt,warewolf/libvirt,iam-TJ/libvirt,rmarwaha/libvirt1,andreabolognani/libvirt,bjzhang/libvirt,iam-TJ/libvirt,emaste/libvirt,rlaager/libvirt,emaste/libvirt,agx/libvirt,olafhering/libvirt,andreabolognani/libvirt,jfehlig/libvirt,taget/libvirt,trainstack/libvirt,fabianfreyer/libvirt,warewolf/libvirt,jardasgit/libvirt,zippy2/libvirt,zhlcindy/libvirt-1.1.4-maintain,iam-TJ/libvirt,agx/libvirt,shugaoye/libvirt,iam-TJ/libvirt,andreabolognani/libvirt,libvirt/libvirt,novel/fbsd-libvirt,jeckersb/libvirt,warewolf/libvirt,VenkatDatta/libvirt,eskultety/libvirt,rmarwaha/libvirt1,jfehlig/libvirt,crobinso/libvirt,agx/libvirt,dumbbell/libvirt,datto/libvirt,VenkatDatta/libvirt,fabianfreyer/libvirt,cbosdo/libvirt,jfehlig/libvirt,trainstack/libvirt,siboulet/libvirt-openvz,datto/libvirt,rmarwaha/libvirt1,zippy2/libvirt,rmarwaha/libvirt,novel/fbsd-libvirt,emaste/libvirt,cbosdo/libvirt,elmarco/libvirt,zhlcindy/libvirt-1.1.4-maintain,warewolf/libvirt,zippy2/libvirt,jeckersb/libvirt,dumbbell/libvirt,taget/libvirt,trainstack/libvirt,crobinso/libvirt,VenkatDatta/libvirt,fabianfreyer/libvirt,shugaoye/libvirt,novel/fbsd-libvirt,bjzhang/libvirt,crobinso/libvirt,rlaager/libvirt,novel/fbsd-libvirt,nertpinx/libvirt,warewolf/libvirt,novel/fbsd-libvirt,wiedi/libvirt,emaste/libvirt,VenkatDatta/libvirt,dumbbell/libvirt,siboulet/libvirt-openvz,agx/libvirt,iam-TJ/libvirt,siboulet/libvirt-openvz,nertpinx/libvirt,emaste/libvirt,olafhering/libvirt,fabianfreyer/libvirt,taget/libvirt,nertpinx/libvirt,novel/fbsd-libvirt,rlaager/libvirt,bjzhang/libvirt,rmarwaha/libvirt1,jeckersb/libvirt,taget/libvirt,rmarwaha/libvirt,eskultety/libvirt,jeckersb/libvirt,nertpinx/libvirt,jeckersb/libvirt,rmarwaha/libvirt,dumbbell/libvirt,emaste/libvirt,warewolf/libvirt,novel/fbsd-libvirt,datto/libvirt,libvirt/libvirt,cbosdo/libvirt,siboulet/libvirt-openvz,trainstack/libvirt,jardasgit/libvirt,zippy2/libvirt,rmarwaha/libvirt,wiedi/libvirt,warewolf/libvirt,eskultety/libvirt,zhlcindy/libvirt-1.1.4-maintain,wiedi/libvirt,dumbbell/libvirt,elmarco/libvirt,bjzhang/libvirt,datto/libvirt,jardasgit/libvirt,eskultety/libvirt,iam-TJ/libvirt,olafhering/libvirt,zhlcindy/libvirt-1.1.4-maintain,rlaager/libvirt,rmarwaha/libvirt,trainstack/libvirt,cbosdo/libvirt,trainstack/libvirt,siboulet/libvirt-openvz,jardasgit/libvirt,taget/libvirt,andreabolognani/libvirt,jeckersb/libvirt,wiedi/libvirt