Werk #1753: win_bios: handle case with colons in BIOS version

Component	HW/SW inventory
Title	win_bios: handle case with colons in BIOS version
Date	Dec 9, 2014
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.2.6b1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

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