Fix libxl driver startup
Fix libxl driver startup

  When you happen to have a libvirtd binary compiled with the
libxenlight driver (say you have installed xen-4.1 libraries)
but not running a xen enabled system, then libvirtd fails to start.

The cause is that libxlStartup() returns -1 when failing to initialize
the library, and this propagates to virStateInitialize() which consider
this a failure. We should only exit libxlStartup with an error code
if something like an allocation error occurs, not if the driver failed
to initialize.

* src/libxl/libxl_driver.c: fix libxlStartup() to not return -1
  when failing to initialize the libxenlight library

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