Fix crash when msi=false introduced in 660c97ee (msi_vectors is NULL in
this case)
Signed-off-by: NMarc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: NMarkus Armbruster <armbru@redhat.com>
(cherry picked from commit 47213eb1)
Signed-off-by: NMichael Roth <mdroth@linux.vnet.ibm.com>