virsh: say save-image-edit failed only when it does
virsh: say save-image-edit failed only when it does

The common code for editing files in virsh-edit.c expects EDIT_DEFINE to
return 0 on failure. virDomainSaveImageDefineXML returns 0 on success.

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