absolutePathFromBaseFile: avoid an unnecessary use of assert
absolutePathFromBaseFile: avoid an unnecessary use of assert

* src/util/storage_file.c (absolutePathFromBaseFile): While this use
of virAsprintf is slightly cleaner than using stpncpy(stpcpy(...,
it does impose an artificial limitation on the length of the base_file
name.  Rather than asserting that it does not exceed INT_MAX, return
NULL when it does.

nertpinx/libvirt,datto/libvirt,taget/libvirt,jfehlig/libvirt,warewolf/libvirt,taget/libvirt,zippy2/libvirt,jeckersb/libvirt,fabianfreyer/libvirt,sshah-solarflare/Libvirt-PCI-passthrough-,emaste/libvirt,kantai/libvirt-vfork,novel/fbsd-libvirt,emaste/libvirt,rbu/libvirt,nertpinx/libvirt,leilihh/libvirt,amery/libvirt-vserver,rbu/libvirt,rmarwaha/libvirt1,crobinso/libvirt,soulxu/libvirt-xuhj,jfehlig/libvirt,trainstack/libvirt,olafhering/libvirt,shugaoye/libvirt,jeckersb/libvirt,shugaoye/libvirt,emaste/libvirt,novel/fbsd-libvirt,jfehlig/libvirt,foomango/libvirt,danwent/libvirt-ovs,jeckersb/libvirt,andreabolognani/libvirt,novel/fbsd-libvirt,iam-TJ/libvirt,olafhering/libvirt,wiedi/libvirt,iam-TJ/libvirt,andreabolognani/libvirt,trainstack/libvirt,emaste/libvirt,rmarwaha/libvirt,leilihh/libvirt,siboulet/libvirt-openvz,amery/libvirt-vserver,zhlcindy/libvirt-1.1.4-maintain,usc-isi/libvirt,dumbbell/libvirt,wiedi/libvirt,rbu/libvirt,andreabolognani/libvirt,soulxu/libvirt-xuhj,soulxu/libvirt-xuhj,dumbbell/libvirt,olafhering/libvirt,siboulet/libvirt-openvz,sshah-solarflare/Libvirt-PCI-passthrough-,eskultety/libvirt,warewolf/libvirt,libvirt/libvirt,datto/libvirt,agx/libvirt,sshah-solarflare/Libvirt-PCI-passthrough-,siboulet/libvirt-openvz,foomango/libvirt,rmarwaha/libvirt,wiedi/libvirt,novel/fbsd-libvirt,rmarwaha/libvirt1,crobinso/libvirt,amery/libvirt-vserver,cbosdo/libvirt,VenkatDatta/libvirt,usc-isi/libvirt,zhlcindy/libvirt-1.1.4-maintain,foomango/libvirt,rbu/libvirt,trainstack/libvirt,nertpinx/libvirt,elmarco/libvirt,trainstack/libvirt,bjzhang/libvirt,datto/libvirt,VenkatDatta/libvirt,rbu/libvirt,rmarwaha/libvirt,kantai/libvirt-vfork,warewolf/libvirt,usc-isi/libvirt,novel/fbsd-libvirt,trainstack/libvirt,jardasgit/libvirt,zhlcindy/libvirt-1.1.4-maintain,warewolf/libvirt,novel/fbsd-libvirt,cbosdo/libvirt,iam-TJ/libvirt,zhlcindy/libvirt-1.1.4-maintain,iam-TJ/libvirt,kantai/libvirt-vfork,agx/libvirt,dumbbell/libvirt,amery/libvirt-vserver,warewolf/libvirt,libvirt/libvirt,fabianfreyer/libvirt,eskultety/libvirt,leilihh/libvirt,emaste/libvirt,leilihh/libvirt,soulxu/libvirt-xuhj,soulxu/libvirt-xuhj,kantai/libvirt-vfork,sshah-solarflare/Libvirt-PCI-passthrough-,andreabolognani/libvirt,rmarwaha/libvirt1,agx/libvirt,rmarwaha/libvirt,jardasgit/libvirt,novel/fbsd-libvirt,elmarco/libvirt,emaste/libvirt,danwent/libvirt-ovs,warewolf/libvirt,elmarco/libvirt,zippy2/libvirt,crobinso/libvirt,jardasgit/libvirt,trainstack/libvirt,libvirt/libvirt,emaste/libvirt,danwent/libvirt-ovs,bjzhang/libvirt,fabianfreyer/libvirt,zippy2/libvirt,wiedi/libvirt,wiedi/libvirt,dumbbell/libvirt,olafhering/libvirt,VenkatDatta/libvirt,VenkatDatta/libvirt,siboulet/libvirt-openvz,elmarco/libvirt,eskultety/libvirt,rmarwaha/libvirt1,eskultety/libvirt,jardasgit/libvirt,kantai/libvirt-vfork,rlaager/libvirt,leilihh/libvirt,jardasgit/libvirt,rlaager/libvirt,nertpinx/libvirt,shugaoye/libvirt,jeckersb/libvirt,jfehlig/libvirt,VenkatDatta/libvirt,agx/libvirt,datto/libvirt,jeckersb/libvirt,dumbbell/libvirt,eskultety/libvirt,andreabolognani/libvirt,usc-isi/libvirt,rlaager/libvirt,rmarwaha/libvirt1,agx/libvirt,danwent/libvirt-ovs,zhlcindy/libvirt-1.1.4-maintain,rmarwaha/libvirt1,bjzhang/libvirt,iam-TJ/libvirt,iam-TJ/libvirt,foomango/libvirt,dumbbell/libvirt,cbosdo/libvirt,siboulet/libvirt-openvz,taget/libvirt,warewolf/libvirt,nertpinx/libvirt,shugaoye/libvirt,fabianfreyer/libvirt,jeckersb/libvirt,trainstack/libvirt,wiedi/libvirt,bjzhang/libvirt,usc-isi/libvirt,shugaoye/libvirt,rmarwaha/libvirt,libvirt/libvirt,rlaager/libvirt,jeckersb/libvirt,zippy2/libvirt,amery/libvirt-vserver,leilihh/libvirt,cbosdo/libvirt,novel/fbsd-libvirt,iam-TJ/libvirt,wiedi/libvirt,taget/libvirt,danwent/libvirt-ovs,rmarwaha/libvirt,foomango/libvirt,datto/libvirt,sshah-solarflare/Libvirt-PCI-passthrough-,rlaager/libvirt,novel/fbsd-libvirt,crobinso/libvirt,bjzhang/libvirt,cbosdo/libvirt,elmarco/libvirt,fabianfreyer/libvirt,taget/libvirt