virsh: Fix return code for dump and migrate
virsh: Fix return code for dump and migrate

When the job monitoring logic was refactored, these two commands
were not converted properly and the result is that a successful
dump or migration (char '0') would be reported as a failed one
(int 48) instead.

Fixes: dc0771cfa2e78ffecd7c8234538ee548748d7bef
Reported-by: Brian Rak <26542f042da3c673ae2ae070265b6d8bf2368646@gameservers.com>
Signed-off-by: Andrea Bolognani <3ada0bee826c753786fdbba72243dfba997094cf@redhat.com>
Reviewed-by: Daniel P. Berrangé <bb938cf255e055ff3507f2627d214e8e62118fcf@redhat.com>

jardasgit/libvirt,olafhering/libvirt,zippy2/libvirt,jfehlig/libvirt,fabianfreyer/libvirt,libvirt/libvirt,olafhering/libvirt,jardasgit/libvirt,jardasgit/libvirt,libvirt/libvirt,jardasgit/libvirt,nertpinx/libvirt,zippy2/libvirt,nertpinx/libvirt,fabianfreyer/libvirt,zippy2/libvirt,crobinso/libvirt,nertpinx/libvirt,nertpinx/libvirt,crobinso/libvirt,jfehlig/libvirt,crobinso/libvirt,nertpinx/libvirt,jfehlig/libvirt,crobinso/libvirt,olafhering/libvirt,jardasgit/libvirt,fabianfreyer/libvirt,jfehlig/libvirt,fabianfreyer/libvirt,fabianfreyer/libvirt,olafhering/libvirt,libvirt/libvirt,zippy2/libvirt,libvirt/libvirt