qemu: Silent bogus warning about unitialized variable
qemu: Silent bogus warning about unitialized variable

GCC complaints about uninitialized use of len, which however is only
used when errors != NULL and in that case len is always initialized.
It's trivial to silence this by always initializing len.

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