Chris Tate 7a0fc87767 Don't crash bmgr if there are no available restore sets
Properly guard against a null set of available restore sets when
validating the token passed to 'bmgr restore TOKEN' against what's
known to exist on the backend.

Fixes bug 3153986

Change-Id: I74bdd4c6242f682833c1633baa4fefccb2b165a7
2010-11-01 15:50:35 -07:00
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