unlock the monitor when unwatching the monitor
unlock the monitor when unwatching the monitor

Steps to reproduce this bug:
# virsh qemu-monitor-command domain 'cpu_set 2 online' --hmp
The domain has 2 cpus, and we try to set the third cpu online.
The qemu crashes, and this command will hang.

The reason is that the refs is not 1 when we unwatch the monitor.
We lock the monitor, but we do not unlock it. So virCondWait()
will be blocked.

Signed-off-by: Wen Congyang <59c7438a9275f5dd0b96a91958b493a9d005ad46@cn.fujitsu.com>

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