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 Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

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