virsh: Resolve Coverity 'MISSING_BREAK'
virsh: Resolve Coverity 'MISSING_BREAK'

https://bugzilla.redhat.com/show_bug.cgi?id=924596

Recent commit '53531e16' resulted in a new Coverity warning regarding
a missing break in the ':' options processing. Adjust the commit to
avoid the issue.
(cherry picked from commit 55b46920bbcceaad6c71a74eb5877c0d2bebf673)

mithleshvrts/libvirt-0.10.2,mithleshvrts/libvirt-0.10.2,mithleshvrts/libvirt-0.10.2,mithleshvrts/libvirt-0.10.2,mithleshvrts/libvirt-0.10.2