Werk #1755: cisco_vpn_tunnel: fix exception in case tunnel is not OK

Component	Checks & agents
Title	cisco_vpn_tunnel: fix exception in case tunnel is not OK
Date	Dec 12, 2014
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.2.7i1 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

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